I Little bit Modified the game.
İf you guess the letter and the letter will show up in the terminal, so game will be easier, however I want to add Another terminal (or something like that) to use as a notepad for example:
Bull : a
Cow : b
Cow : c
Bull: 1 Cows : 2
abcd
I wanted to take a note of that by swiching terminals or automaticaly to make the game easier but its way far above me.