Need advice for testing of hypotheses related to the self-citation method

[Aga Tentakulus]

chol and shol differ by one, as do SOE and ZOE
dain and daiin differ by one, as do 8AN and 8AM

The question is how I view it.
In normal usage, for example, e + r = er. Sum in letters. 1+1=2.
But already in normal Latin usage, 8+9=89.
Sum in letters 2+4=3. (de unum = tum).
This is how it works in the dain/daiin systems to 8an/8am. 4/5 to 3/3.
How am I supposed to teach that to a programme?