Simple. Every 'cipher' guessed, the 'cipher' gets longer, and one more possible character is added.
Possible Charecters (p.c.) for the first code are: 0-9
p.c. for second: 0-9, a
p.c.3: 0-9, a, b
p.c.4: 0-9, a-c
p.c.5: 0-9, a-d
I will add 5 more codes every time the 5th, 10th.... are discovered.
ALSO: this is different. very different. (i'm keeping up with this one, and it's mine.)
start guessing the first cipher! (i wont judge longer guesses.)