4digits - 1.1.4-1+b1 main

4digits is a guess-the-number puzzle game. It's called Bulls and Cows,
and in China people simply call it Guess-the-Number. The game's
objective is to guess a four-digit number in 8 tries and the shortest
time possible. It is similar to Mastermind, but the four digits must
be unique. 4digits has both a graphical user interface version and
a command-line version.