Strikes & Balls

You write a number of 4 different chypers, and u will get a strike for each chyper who does exist and is placed in the same column as the cpu number and a ball for each chyper who does exist but is placed in another column. Same for the cpu. You must understand the opponent number by making different tries and get the right numbers. You cannot put twice the same chyper in a Number, but you can use the 0 chyper to be sure of other numbers. Good luck.