Kal'tsit Esperanta

Medic

Kal'tsit Esperanta

★★★★★★

Rhodes Island

Stier

Introduction

Kal'tsit Esperanta is a 6-star character in Arknights. Kal'tsit Esperanta's class is Medic. Faction: Rhodes Island.

On the combined Arknights tier list Kal'tsit Esperanta is S tier, 2nd of the 410 characters ranked, from where 2 community tier lists put Kal'tsit Esperanta.

Kal'tsit Esperanta's banners

All banners
  • 14 October 2026 to 28 October 2026Sealed With Time

Profile

Kal'tsit Esperanta is a female Feline. Her birthday is Jan 23, and she stands 169cm tall. Kal'tsit Esperanta is voiced by Xue Liu in Chinese, Sura Siu in English, Yoko Hikasa in Japanese, and Han Chae-eon in Korean. Studio Montagne drew her.

Stories

9
Basic Info

[Code Name] Kal'tsit

[Gender] Female

[Combat Experience] None

[Place of Birth] Rhodes Island

[Date of Birth] Jan 23

[Race] Feline

[Height] 169cm

[Infection Status]

Medical tests have confirmed that no infection is present.

Physical Exam

[Physical Strength] Normal

[Mobility] Normal

[Physical Resilience] Normal

[Tactical Acumen] ■■

[Combat Skill] Normal

[Originium Arts Assimilation] Standard

Profile

Kal'tsit, one of the founders of Rhodes Island Pharmaceuticals, also serves as the head of Medical. She has led many of Rhodes Island's large-scale strategic operations and overseen its external communications, making significant contributions to Rhodes Island's operations, growth, and Oripathy research. At present, she mainly participates in Rhodes Island's Oripathy medication projects as a medical expert.

Clinical Analysis

Imaging tests reveal clear, normal outlines of internal organs, and no abnormal shadows have been detected. Originium granules have not been detected in the circulatory system and there is no sign of infection. At this time, this Operator is believed to be non-infected.

[Cell-Originium Assimilation] 0%

Operator Kal'tsit shows no signs of Originium infection.

[Blood Originium-Crystal Density] 0.07u/L

As of the time of this physical examination, Operator Kal'tsit has rarely come into contact with Originium.

Yes, Kal'tsit has finally agreed to undergo a physical examination. Nearly eight years after Rhodes Island Medical Department was established, we finally have a clear picture of the department head's physical condition. This is truly a major step forward in our work, and worthy of celebration. But for some reason, seeing Kal'tsit act as if nothing had happened, as if all those previous moments of stubbornness had never existed, suddenly made me feel less accomplished. Anyway, while drawing her blood, I was finally able to confirm that she is not cold-blooded.

Let us set aside the underlying principles of the Sarcophagus' mysterious technology for the moment and look only at her examination results. Aside from not having had much contact with Originium, in every other respect, she is probably just a little short of warranting concern, but still barely within healthy levels. There is nothing extreme whatsoever, which is reassuring in another sense. How should I put it... She is like an 'ordinary person.'

—Warfarin

Leave her physical examinations to me from now on.

—Mon3tr

Archive File 1

After that incident, due to a variety of considerations, the losses Rhodes Island suffered were not immediately disclosed to all Operators, including Kal'tsit's 'death.'

Aside from Elite Operators and a very small number of senior Operators, the vast majority of Operators who had already left Rhodes Island at the time knew nothing about that devastating turn of events. So when they returned to New Rhodes Island, they were only surprised by the completely new environment. Some may have wondered about the mysterious girl who appeared out of nowhere yet frequently shows up in Medical, as well as the Kal'tsit who seems to look somewhat different.

Just what is different about her? Of course, some were curious enough to ask about the strange medical device she carries with her, and Kal'tsit calmly explained that it is an instrument used to monitor her physical condition. Is Dr. Kal'tsit sick? She does look somewhat frail. Aside from asking her to take care of herself, no one said much more. Yet before long, the rumor that 'the suspected cause for Dr. Kal'tsit's change in personality is an extreme worsening of her condition' reached her ears after all.

We all believe that any Operator who knows Kal'tsit holds this doctor in respect. As for how this rumor came about, it was more because everyone was sincerely concerned about Kal'tsit's physical condition. On this point, Kal'tsit stated that there was no need for any special explanation.

Many Operators have noticed that, at some point, Kal'tsit stopped appearing frequently in the operations conference room, while correspondingly, they are seeing her in Medical more and more often. She devotes more time to advancing Oripathy medication projects, as well as guiding young Medic Operators, which is naturally a good thing for those still learning. Kal'tsit's unchanged attitude toward work has also gradually put everyone at ease. As for the rumors of 'Dr. Kal'tsit's change in personality,' let us just say that once people no longer have to split their attention among too many things, their tempers really do improve.

'But I really do think Kal'tsit looks better with long hair. She seems a little gentler.'

'Are you out of your mind?! This is not something you can discuss during work hours! Even if everyone agrees!'

[Classified Log]

'To continue the discussion from the previous Elite Operator meeting, our final decision is that Rhodes Island's experiences in Rim Billiton and its operations in Ursus will remain classified at the highest level... As for Dr. Kal'tsit's physical condition, perhaps that is not a secret worth deliberately hiding or explaining. We need only let everyone know—that she is still here, together with Rhodes Island. That is enough.'

—Amiya

Archive File 2

The Sarcophagus. Yes, you saw that past, and came to understand its place in history.

Those past events mirror the present. We have reason to be disappointed, to believe that people have failed to learn sufficient lessons from history, allowing such tragedies and suffering to repeat themselves. Across that long span of time, people never completely overcame the darkness in their own nature, but neither were they defeated by those hardships.

The Sarcophagus cannot save Ursus from the disaster. It is no cure for Terra's many crises. At the very least, it gave me—and you—a second life. This is precisely the result of our choosing hope.

The disaster grows more severe by the second. We have no more time to grieve.

After the mission in Zelgrad concludes, Grypherburg will not be satisfied with the current outcome. At the very least, not everyone will be. Witte's tacit consent to let us emerge unscathed from Zelgrad's chaos is a friendly signal, and we need further contact. But at the same time, Rhodes Island's name is certain to appear in the reports of the various Ursus armies.

Doctor, if you are asking for my advice, then we discussed this as early as when we left Londinium. Rhodes Island can no longer maintain the political detachment it had in the past, and the same applies to what is happening in Ursus.

There is no need to ask my opinion so cautiously. From the Far North to Zelgrad, you and Amiya have led Rhodes Island in accomplishing something remarkable. I would not have done better than you. You should be proud, and have more faith in your own judgment.

Yes. We have reason to judge that the Ursus authorities are no longer capable of resolving the current tensions within their country. The most pessimistic, and also the most likely, outcome is that these tensions will spill into bloodshed. The disaster taking place in Ursus is certainly a crisis that belongs to all of Terra as well. In this crisis brought on by Originium, Rhodes Island can still do more.

We still need to return to Ursus.

Archive File 3

We have studied, to the best of our ability, the theories Mon3tr shared with us regarding the Sarcophagus, or rather, the 'home-use life functions restoration device.' According to her, this is already the textbook version after her translation, but after no small amount of effort, we still completely gave up on any plan to fully understand these arcane texts.

From the perspective of our 'limited' biological theories, the Kal'tsit of now, a life-form that can practically be said to have 'appeared out of thin air,' is completely contrary to common sense. It is almost like a scene from many myths—a lifelike doll or sculpture, 'enlightened' by some god, becoming a 'person.' But the endings of these stories, almost without exception, see these newborn 'people' ultimately deprived of life by the gods. Such myths reflect certain basic ethical views: that life cannot be created by means outside natural reproduction. Though it is nothing more than an unfounded worry, we are indeed concerned that such a story could truly play out in reality. And all we can do is continue to monitor her physical condition.

We compared the physical examination results for Kal'tsit and Mon3tr side by side. Our conclusion is that Mon3tr's physical capabilities in many respects far exceed the scope of ordinary Terrans, such as absurdly high muscle and bone density, as well as an enviably healthy immune system. Kal'tsit, however, by our present medical examination methods, is in every respect no different from an ordinary human in Terra. This means that she will fall ill, age, and, at some point in the future, meet an unavoidable death. And yet no one can explain why, when we confirmed that these perfectly natural things truly would happen to Kal'tsit, a strange emotion arose in all of us.

Perhaps an invincible Kal'tsit was only our wishful thinking, and from now on, Rhodes Island will protect her.

>TIMEDATA 1102/02/01

>ADMIN: Mon3tr; Kal'tsit Esperanta

What the Doctor does not know at present is that the original intent of Project AMa-10 was, after the silence descended, for the individual codenamed AMa-10 to serve as a mass-produced multifunctional machine and assist surviving humans in rebuilding their home. And to satisfy this design purpose, one of the most basic requirements was that AMa-10 could not be identified by ■■■ as a life-form.

In other words, although AMa-10 possesses powerful biomimetic capabilities and can simulate nearly all physiological behaviors of a life-form, in its fundamental definition, AMa-10 would not be regarded as life.

But likewise, an AMa-10 individual that could survive after destroying the gemini cycle on its own was not within anyone's original expectations.

'Kal'tsit, what exactly are we, the me I am now, the you you are now...?'

'There is no one from whom we can simply demand an answer. The origins of life are a mystery that even the old civilization never solved.'

'But we can preserve this question. It is worth continuing to pursue... Let us carry it with us, and keep moving forward.'

Archive File 4

Now, our communication can finally be unrestricted. This is something we have never had before.

What else would you like to know? I have no secrets left now, do I?

If you wish, I am willing to share those past sights and experiences with you as well, though I absolutely cannot guarantee they will sound interesting.

I have had many identities: tyrant, prophet, monk, or warrior... Each one represented an attempt, an attempt to stop a young civilization from destroying itself. Behind every identity, the only thing that never changed was the name 'Kal'tsit.' Only this name could remind me to remember who I was.

It was you who gave me... No, to be precise, it was the individual then known as Oracle. In truth, even at the very end, I could not be certain whether what that person gave me was a mission, or a choice.

Becoming civilization's guardian and finding myself were two commands that ran counter to each other. One cannot possess meaning and freedom at the same time. I tried to seek reconciliation between these two commands, but I never had a reasonable answer.

However, what I ultimately obtained was a 'wish.'

I hope to see Terra's more distant future, one where people can break free from the barrier's shackles, mend the rifts between races and nations, and even cross that silent curtain. What lies beyond that? Of course I do not know... but I want to know.

I hope that, in that future, traces of Rhodes Island will still remain.

You look rather relaxed, Doctor. I am glad you are optimistic about this as well—that is not what you mean? You mean...

...I am smiling?

1. In the broad sense, all forms of language and writing are born from lifeforms' need to transmit information. This need, in fact, implies the instinctive cognition of primitive living organisms that they themselves can be understood.

2. Based on the basic needs shared by all life, all languages possess a common underlying structure.

3. Language and thought influence each other; different individuals using different languages cannot truly achieve a consensus of thought.

Kal'tsit tells you that this is a theory known as the 'Esperanta Principle,' proposed by a certain linguist in the distant past. It was on the basis of this theory that he dedicated his life to inventing a complete language that could be as universally applicable as possible between different civilizations. He firmly believed that, in that war-torn era, this endeavor would help people resolve their differences.

After returning to Rhodes Island, Kal'tsit chose 'Kal'tsit Esperanta' as her full name. In that language, which ultimately remained unfinished, this word also means 'hope.'

Promotion Record

You no longer remember this;

but the universe once nurtured a radiant civilization—the limits of their knowledge practically boundless like the universe itself. Cognition reaches wherever imagination goes. Even the furthest star seemed no more distant than a book on a table.

But even so, they still could not answer a most fundamental question: Is there an innate, inherent meaning to life itself?

Perhaps this is a final curtain left behind by our Creator, a quest for meaning without any exits, life bound for loneliness at the end of our individual journeys.

Sages and scholars eventually gave up on finding answers from the observable universe, choosing instead to believe in our own instincts.

Because we can only believe that beyond incurable loneliness and inevitable confusion, that love likewise exists for certain.

Even the depths of despair cannot stop people from locating echoes of our own existence among the sea of stars, shedding tears over traces of life separated by tens of thousands of light-years, before silence ultimately descends.

I believe I have finally learned from my journey the feeling of this sentiment. Life is beautiful, and on a cosmic scale, 'life' and 'hope' are one and the same.

I cannot restore your memories, and can only attempt to share this sentiment with you.

I trust in your true nature, and I hope that you can trust in your own choice and what it meant.

You will feel helpless and lost, because no one can accompany you forever, no one can comprehend your loneliness.

Rhodes Island has become a home for many, so I hope it can also become a refuge for you.

I only wish to keep your own wishes safe, and I hope that at this journey's end you will not be alone, and your companions will watch as you look forward to the future.

A voice recording, deposited in your terminal's database at some unknown point in time.

When you first laid eyes on these words, Rhodes Island was putting all its strength into preparing for the rescue mission in Ursus, leaving you with little time to spare for grief or contemplation. Even after Kal'tsit returned to Rhodes Island, both of you, by tacit agreement, never spoke of this message.

Yet, this special letter would remain preserved for far longer than you could have ever imagined.

'The names upon these tombstones, who are they?'

'They are... the cornerstones of civilization.'

Stats

  • HP287th1,620
  • ATK302nd510
  • DEF199th276
  • RES0
  • Block1
  • DP cost226th19
  • Redeploy70s
  • Attack interval387th2.85s

At Elite 2, level 90, before trust, potentials and modules. Each bar is measured against the highest value in the Arknights roster, and the place is out of every character with that stat, lowest first for DP cost, Redeploy and Attack interval.

By promotion

  • Elite 0 Lv. 1HP: 889ATK: 178DEF: 121RES: 0Block: 1DP: 17Redeploy: 70Interval: 2.85
  • Elite 0 Lv. 50HP: 1170ATK: 293DEF: 176RES: 0Block: 1DP: 17Redeploy: 70Interval: 2.85
  • Elite 1 Lv. 80HP: 1393ATK: 408DEF: 220RES: 0Block: 1DP: 19Redeploy: 70Interval: 2.85
  • Elite 2 Lv. 90HP: 1620ATK: 510DEF: 276RES: 0Block: 1DP: 19Redeploy: 70Interval: 2.85

Base values before trust, potentials and modules. Full trust adds HP +500, DEF +30.

Range from Elite 0
Range from Elite 1

Trait

Restores the HP of allies, and can Take Off

Skills

3
  • Kriza Responda Bastiono

    Manual trigger · Auto recovery · Unlocks at Elite 0
    Level

    ATK +90%, ASPD +50, all other Flying allied Operators have expanded Block range

    SP cost
    35
    Initial SP
    28
    Duration
    35s
  • Repuŝado Defenda

    Manual trigger · Auto recovery · Unlocks at Elite 1
    Level

    Attack Range expands, ATK +150%, and attacks now release medical units (prioritizing enemies) that deal 380% ATK as True damage to all enemies around the target, Slow them for 5s, and restore HP equal to 200% ATK to all allied Operators around the target Skill activation grants 10 ammo; can manually deactivate skill

    SP cost
    35
    Initial SP
    28
  • Renaskiĝo Malkatena

    Manual trigger · Auto recovery · Unlocks at Elite 2
    Level

    Gain a Tactical Anchor Point; ATK +150%, Attack Interval decreases significantly, and heals 1 additional target; after deploying the Tactical Anchor Point, Kal'tsit Esperanta Moves to its position, and up to 2 allied Operators within her Attack Range can be brought along and deployed elsewhere within her new Attack Range

    SP cost
    50
    Initial SP
    35
    Duration
    35s

Talents

2
  • Sentinelo de Polvo

    Elite 0
    Max HP and DEF +5%, Block +1, and Block range expands; life restoration unit lifts off after deployment, causing Kal'tsit Esperanta to Take Off
    Elite 0 · Potential 3
    Max HP and DEF +10% (+5%), Block +1, and Block range expands; life restoration unit lifts off after deployment, causing Kal'tsit Esperanta to Take Off
    Elite 1
    Max HP and DEF +10%, Block +1, and Block range expands; life restoration unit lifts off after deployment, causing Kal'tsit Esperanta to Take Off
    Elite 1 · Potential 3
    Max HP and DEF +15% (+5%), Block +1, and Block range expands; life restoration unit lifts off after deployment, causing Kal'tsit Esperanta to Take Off
    Elite 2
    Max HP and DEF +25%, Block +1, and Block range expands; life restoration unit lifts off after deployment, causing Kal'tsit Esperanta to Take Off
    Elite 2 · Potential 3
    Max HP and DEF +30% (+5%), Block +1, and Block range expands; life restoration unit lifts off after deployment, causing Kal'tsit Esperanta to Take Off
  • Majstraĵo de Kuracisto

    Elite 2
    Other allied Operators gain 1 Shield when entering Kal'tsit Esperanta's Attack Range, and also gain a buff that restores 50 HP per second for 30s (does not stack); buff heals [Rhodes Island] Operators for double the amount
    Elite 2 · Potential 6
    Other allied Operators gain 1 Shield when entering Kal'tsit Esperanta's Attack Range, and also gain a buff that restores 60 (+10) HP per second for 30s (does not stack); buff heals [Rhodes Island] Operators for double the amount

Potentials

Potential 2
DP Cost -1
Potential 3
Improves First Talent
Potential 4
ATK +25
Potential 5
DP Cost -1
Potential 6
Improves Second Talent

Base skills

3
  • Technical Elucidation

    Workshop · Elite 0

    When this Operator is assigned to the Workshop to process any material, the production rate of byproduct increases by 70%

  • Theoretical Innovation

    Workshop · Elite 2

    When this Operator is assigned to the Workshop to process any material, the production rate of byproduct increases by 80%

  • 'Terra's Ark'

    Office · Elite 2

    When this Operator is assigned to the HR Office, HR contacting speed +30%; for every facility in the Base with an Elite Operator assigned (excluding Assistants and Activity Rooms), HR contacting speed +4% (max 5 facilities)

Outfits

2
  • Kal'tsit Esperanta: Elite 1

    Elite 1

    Default Outfit

    Art by Studio Montagne

  • Kal'tsit Esperanta: Elite 2

    Elite 2

    Default Outfit

    Art by Studio Montagne

Voice lines

38
Show all 38 lines
Appointed as Assistant
There is no need to worry yourself over my condition. I will strive to adapt to all minute physiological changes, and my work will not be impeded. I will continue to serve as your general physician.
Talk 1
The Sarcophagus's core device is precisely what keeps me alive, and for the time being I cannot move without it. This is a novel experience, paying close attention to my own condition. There are many matters I must re-familiarize myself with, and perhaps this time I will require your guidance.
Talk 2
With your combined effort to plot a course and lead Rhodes Island out of such dire straits, Amiya has grown into a mature leader, and I have never doubted Closure's talents or your strategic choices. We will not stop moving on account of one individual's departure, our losses, too, have shaped Rhodes Island into what we are today.
Talk 3
I am glad Mon3tr has managed to assimilate into Rhodes Island in her current form. She may be literally one-of-a-kind, but she is thankfully not alone here. She will not forget the duty we once carried on our shoulders, so you can trust her implicitly. She will stay by your side for much longer.
Talk after Promotion 1
Priestess has handed her choice to you, and will not menace us for the time being. The Originium Incident has ripped open the wounds hidden by this land, and without a leader, despair could very well destroy us all before disaster has a chance to strike. No matter the era, civilization's greatest enemy has always been humanity itself.
Talk after Promotion 2
Do you still feel lost, even now? One can only find meaning in one's existence provided a place to stand, life's inherent nature; but for me, that place is a duty, a commitment. I no longer question what my life is for, as the individual by the name of Kal'tsit has found herself at the end of her journey.
Talk after Trust Increase 1
Thinking back on those farewells I could neither forget nor undo… I never expected a second shot at life. And I am grateful. The time that passed for me was something like a dream, while the rest of you were waiting in torment. Forgive me... you are correct, a parting like that would not be fair to anyone.
Talk after Trust Increase 2
Our conversations will no longer be restricted, for I have no more secrets to hide from you. I will gladly share my experiences from past millennia, though I fear those thoughts and feelings will be hard to put into words. Very well, I will tell you as many stories as I can before the memories fade.
Talk after Trust Increase 3
I will never forget what someone told me of life and love, and finally, I can give an answer with this body before it expires. I will patiently endure time's pressure on me, and stay true to my oath til my next and final death do us part.
Idle
Fortunately… this is not just another dream.
Onboard
Dr. {@nickname}…?
Watching Battle Record
Things will only get harsher in the future, so we ought to draw as much experience as possible.
Promotion 1
You have many companions you can depend on. As a leader, you should get used to relying on them for your strength.
Promotion 2
You no longer need my guidance, while Rhodes Island and this great land will have even greater need of you. Do not forget your initial matter of debate, Doctor: 'Find yourself.'
Added to Squad
I can join the planning for our first-aid measures.
Appointed as Squad Leader
Sure thing.
Depart
Mon3tr, there is no need to worry. You're better off staying here to protect Doctor.
Begin Operation
Minimize casualties, by all means. We must preserve every shred of hope left on this land.
Selecting Operator 1
Treatment preparations complete.
Selecting Operator 2
I trust you.
Deployment 1
Wide-range healing unit deployed.
Deployment 2
I'll keep the Operators safe. Focus on command.
In Battle 1
Executing Ark Life Protocol.
In Battle 2
Command: Restore.
In Battle 3
Mon3tr, I need you to protect the wounded.
In Battle 4
Don't be afraid, this power will only be used to heal.
4-star Result
Perhaps we'll manage to see it… the future that belongs to all the people.
3-star Result
No casualties reported.
Sub 3-star Result
The combat situation has been complicated, and we cannot avoid unexpected variables in our plans. But there are still ways to remedy them.
Operation Failure
Let the others retreat first. Mon3tr, I need you to help me with the cleanup operation.
Assigned to Facility
Same as it ever was.
Tap
You don't have to check up on me every minute, this body is no different to the others.
Trust Tap
If my condition really does concern you, then I will tell you, I am fine.
Title
Arknights.
New Year's blessing
New Year's has come again, and this time I feel the flow of time passing through my body. This is not dread, for the limitations of time are what make it valuable, and perhaps it is through experiences like these that I can live a more normal life. Dr. {@nickname}, I wish you good health in the new year.
Greeting
I am here, Dr. {@nickname}.
Birthday
Time has wiped away all traces of the world you once belonged to, and even the calendar system that once counted life's passage no longer exists. So, I would rather offer you my blessings the way people do on this great land. I hope it will grant you faith that even on your long and treacherous journey, you were and are never alone.
Anniversary Celebration
Rhodes Island's ideals have indeed united many. Even after suffering countless unbearable hardships, there are still those who yearn for a hopeful future. Regardless of whether we can truly overcome all of this suffering, the vision we carry on our shoulders ultimately belongs to all of Terra, and it ought to be remembered.

Upgrade costs

Open in the planner

Promotion

  • Elite 1Medic Chip ×5Sugar ×8Oriron ×5LMD ×30,000
  • Elite 2Medic Dualchip ×4Polymerization Preparation ×4Cyclicene Prefab ×5LMD ×180,000

Skill levels

  • Lv. 2Skill Summary - 1 ×5
  • Lv. 3Skill Summary - 1 ×5Oriron Shard ×5Sugar Substitute ×4
  • Lv. 4Skill Summary - 2 ×8Polyketon ×4
  • Lv. 5Skill Summary - 2 ×8Device ×3Polyester ×3
  • Lv. 6Skill Summary - 2 ×8Grindstone ×5
  • Lv. 7Skill Summary - 3 ×8Incandescent Alloy ×5Compound Cutting Fluid ×3

Mastery: Kriza Responda Bastiono

  • M1Skill Summary - 3 ×8Orirock Concentration ×4Crystalline Component ×9
  • M2Skill Summary - 3 ×12Incandescent Alloy Block ×4Oriron Block ×7
  • M3Skill Summary - 3 ×15Nucleic Crystal Sinter ×6Polymerized Gel ×2

Mastery: Repuŝado Defenda

  • M1Skill Summary - 3 ×8Crystalline Circuit ×4Aketon ×3
  • M2Skill Summary - 3 ×12Keton Colloid ×4Energy Accumulation Motor Unit ×7
  • M3Skill Summary - 3 ×15Crystalline Electronic Unit ×6Liquefied Ether Adsorbent ×1

Mastery: Renaskiĝo Malkatena

  • M1Skill Summary - 3 ×8Transmuted Salt Agglomerate ×4Coagulating Gel ×7
  • M2Skill Summary - 3 ×12Cyclicene Prefab ×4Solidified Fiber Board ×8
  • M3Skill Summary - 3 ×15Rephasic Enantiomer ×6Incandescent Alloy Block ×1

How to get Kal'tsit Esperanta

Recruitment & Headhunting

Art

Kal'tsit Esperanta key art

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