I'm positive that IDs are written in base 64 notation
If all IDs consist of 8 characters then 64^8 would be the maximum amount of possible ID variations
As you mentioned in
>>14059392 we first need to clarify what actually counts as a kot id
We need to denote all possible variations of the word kot in both upper and lower case as well as those cases with zero in between (eg. k0t)
So that would be 2^3 + 2^2 = 12
Therefore the probability of receiving a kot id would be equal to:
12/64^8
With a set that interests us consisting of words:
kot
kOt
koT
Kot
KOt
KOT
kOT
KoT
k0t
K0t
k0T
K0T