Try to break the code!
Basic: Pick 3 digits from 1-9
Advanced: Pick 4 digits from 0-9
Expert: Pick 5 digits from 0-9, x
Maniac: Pick 6 digits from 0-9, x, y
Rules: Correct digit at correct position is represented by A; correct digit at wrong position is represented by B.
ex: The answer is 1357
Your guess is 1234 - 1a1b
Your guess is 5678 - 0a2b