| new | show | |
| hint | check | |
it has 4 unique non-zero digits
i'll tell you how close you are with the number of bulls and cows
bull (b) - the right digit at the right place
cow (c) - the right digit at the wrong place
if my number is 5432 and your number is 1234
then i'll tell you bcc because you have one bull (it's 3) and two cows (it's 2 and 4)
new - guess a new number
show - show the number
hint - suggest a suitable number
check - check your number