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{{Quality|Exceptional|04:24, 17 May 2015 (UTC)}}
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#REDIRECT [[Age]]
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{{av}}
 
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:''This article is about [[creature]] age. For world generation "ages", see [[Calendar#Ages]].''
 
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[[File:Young Man and Old Woman MET DP801451.jpg|thumb|260px|right|One of them has their whole life ahead of them.]]'''Age''' is a [[creature]] attribute describing how long the creature has been alive, including creatures born before the beginning of time in terms of [[world generation]] (year zero). Age determines the life stage of creatures and, until it is fully grown, is the most important element of the creature's body [[size]]. All creatures have an age associated with them, but in fortress mode only your own [[dwarf|dwarves]] will have observable ages in the [[thoughts and preferences]] screen. The age of a creature is determined based on the exact time of its birth, but is displayed in the game as an integer that is ticked up every time it reaches a birthday.
 
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== Effects ==
 
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The age of a creature has an important effect on its overall [[size]] and maturity. The starkest example of this in the game is the case of the [[dragon]], which is born 6,000 cm<sup>3</sup> in size (and technically an adult) then takes a thousand years to reach its full size of 25,000,000 cm<sup>3</sup>. However, the vast majority of the non-sapient creatures your dwarves encounter take one year to mature to adulthood and two years to reach full size; [[elephant]]s and [[giraffe]]s are notable exceptions, as their young take ten years to mature (though they reach full size in only 5 years). Upon reaching adulthood, non-sapient creatures can [[breeding|reproduce]], be [[trained]], [[milk]]ed, [[shearable|sheared]], revert to [[Animal trainer|wild]] status, and various other effects.
 
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The life cycle of [[dwarves]] is slightly more complicated: juveniles ages zero to one are considered babies, and must be carried about by their mothers; between the ages of one to twelve they are considered [[children]], and can perform some limited tasks; and once they reach 12 years of age, they are considered adults. The process is the same for other [[creature#civilized|civilized]] races, the original [[animal people]], and the humanoid [[semi-megabeast]]s.
 
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Another aspect that is controlled by age is lifespan. This is determined by the {{token|MAXAGE}} token, which if present determines the minimum age at which a given creature may die of old age, and the maximum age that may be reached before death is guaranteed. Most organic creatures will eventually die of old age (including fortuitous fortress dwarves), usually within a range of 1-100 years. [[Savage|Giant]] versions of animals inherit their normally-sized brethrens' lifespans, while [[animal people]] usually have somewhat longer lifespans than their representative creatures. A few species, such as [[elf|elves]], [[goblin]]s, and some unintelligent and unnatural creatures, will live until they are killed. [[Megabeast]]s, the [[undead]], [[night creature]]s, and the procedurally generated [[forgotten beast]]s and [[titan]]s are similarly immortal. This immortality is due to such creatures either lacking a {{tt|[MAXAGE]}} token, or having acquired the [[Syndrome#CE_ADD_TAG|NO_AGING]] syndrome tag. Immigrants may sometimes show up with incorrect ages (future birthdates) {{Bug|3945}} or incorrect life stages (4 month old children) {{Bug|3752}}.  This normally does not cause a problem, and life stages get rechecked every birthday. Note that only an intelligent civilized creature vulnerable to death by expiration will seek [[necromancer|necromancy]], which means goblins and elves never become practitioners of the dark arts.
 
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Age does not interfere with a creature's physical or mental [[skill]]s, attributes or behavior; a 150 year old dwarf is as capable as a 12 year old one. Despite most [[vermin]] possessing a noted {{tt|[MAXAGE]}}, they do not seem to be affected by aging; a tamed vermin creature will last forever, even if it would otherwise die after a single year.
 
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The game checks if a creature will die of old age at the beginning of every new year, on the 1st of Granite. In longer-running fortresses, several animals and livestock with short life spans could die at the same time. A creature's lifespan is determined at birth, so restoring from a previous seasonal autosave will ''not'' give them a chance to live longer.
 
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Historical figures existing in year 1 are born in a "time before time" and described with "the appearance of one who is X years old". This includes your starting seven, in young worlds.
 
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== Sample list of age characteristics ==
 
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{| class="wikitable sortable" style="text-align:center"
 
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! style="text-align:left" | Name
 
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! width="20%" | Age of Adulthood
 
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! width="20%" | Age of Full Size
 
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! width="20%" | Minimum Age of Death
 
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! width="20%" | Maximum Age of Death
 
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|-
 
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| style="text-align:left" | [[Ant]]
 
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| 0
 
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| 0
 
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| 1
 
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| 1
 
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|-
 
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| style="text-align:left" | [[Bat]]
 
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| 0
 
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| 0
 
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| 2
 
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| 3
 
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|-
 
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| style="text-align:left" | [[Antman]]
 
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| 0
 
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| 2
 
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| 5
 
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| 8
 
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|-
 
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| style="text-align:left" | [[Dog]]
 
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| 1
 
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| 2
 
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| 10
 
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| 20
 
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|-
 
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| style="text-align:left" | [[Lion]]
 
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| 3
 
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| 2
 
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| 10
 
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| 20
 
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|-
 
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| style="text-align:left" | [[Unicorn]]
 
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| 1
 
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| 2
 
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| 10
 
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| 20
 
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|-
 
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| style="text-align:left" | [[Elephant seal]]
 
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| 1
 
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| 5
 
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| 15
 
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| 25
 
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|-
 
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| style="text-align:left" | [[Sponge]]
 
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| 0
 
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| 0
 
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| 20
 
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| 30
 
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|-
 
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| style="text-align:left" | [[Carp]]
 
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| 1
 
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| 5
 
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| 20
 
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| 30
 
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|-
 
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| style="text-align:left" | [[Ogre]]
 
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| 10
 
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| 20
 
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| 20
 
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| 30
 
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|-
 
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| style="text-align:left" | [[Elephant]]
 
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| 10
 
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| 5
 
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| 50
 
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| 70
 
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|-
 
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| style="text-align:left" | [[Serpent man]]
 
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| 12
 
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| 12
 
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| 60
 
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| 80
 
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|-
 
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| style="text-align:left" | [[Sperm whale]]
 
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| 1
 
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| 10
 
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| 70
 
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| 80
 
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|-
 
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| style="text-align:left" | [[Human]]
 
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| 12
 
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| 12
 
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| 60
 
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| 120
 
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|-
 
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| style="text-align:left" | [[Sea serpent]]
 
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| 6
 
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| 20
 
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| 150
 
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| 170
 
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|-
 
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| style="text-align:left" | [[Dwarf]]
 
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| 12
 
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| 12
 
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| 150
 
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| 170
 
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|-
 
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| style="text-align:left" | [[Kobold]]
 
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| 12
 
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| 12
 
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| 150
 
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| 170
 
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|-
 
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| style="text-align:left" | [[Troll]]
 
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| 10
 
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| 20
 
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| 800
 
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| 1,000
 
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|-
 
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| style="text-align:left" | [[Elf]]
 
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| 12
 
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| 12
 
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| <span style="display:none">99999</span>&mdash;
 
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| <span style="display:none">99999</span>Immortal
 
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|-
 
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| style="text-align:left" | [[Goblin]]
 
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| 12
 
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| 12
 
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| <span style="display:none">99999</span>&mdash;
 
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| <span style="display:none">99999</span>Immortal
 
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|-
 
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| style="text-align:left" | [[Dragon]]
 
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| 0
 
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| 1,000
 
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| <span style="display:none">99999</span>&mdash;
 
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| <span style="display:none">99999</span>Immortal
 
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|-
 
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| style="text-align:left" | [[Minotaur]]
 
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| 12
 
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| 12
 
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| <span style="display:none">99999</span>&mdash;
 
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| <span style="display:none">99999</span>Immortal
 
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|}
 
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== Mechanics ==
 
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The mechanics of aging are defined by [[creature token]]s within creatures' [[raw file]]s, and can easily be modified by those looking to make changes to their game.
 
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*{{tt|[CHILD:#]}}: Age at which children become adults. Set to 1 for most creatures, up to 10 for a few ([[giraffe]], [[elephant]]), and is set to 12 for most sapient creatures.
 
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*{{tt|[BABY:#]}}: For sapient creatures, age at which babies become [[children]]. Always set to 1.
 
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*{{tt|[BODY_SIZE:#:#:#]}}: Controls the body size of the creature, typically two or more are used to constrain its growth pattern. The first number is age in years; the second additional age in days. The third number is its size in cm<sup>3</sup>. The body size points are independent of the age of adulthood for the animal: many animals are adults in one year, but take two years to reach their full size, for instance.
 
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*{{tt|[MAXAGE:#:#]}}: The first number given is the minimum natural lifespan of a creature, while the second is the maximum. The distribution of deaths from natural causes in between the two values is linear (you can test this yourself using [https://gist.github.com/Putnam3145/acd1a457c65ac315719f713677e6c13d this script]); the moment of death-by-old-age of a creature is stored from birth. If this tag is not present at all, the creature is biologically immortal.
 
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{{Translation
 
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| dwarven = anam
 
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| elvish  = eyo
 
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| goblin  = abo
 
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| human  = thad
 
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}}
 
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{{Category|Game mechanics}}
 
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[[ru:Age]]
 

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