IQ Baseball

This is the IQ Baseball game. The answer of this game is 4-digit number. If both number and digit match, it is 'Strike'. If number match but digit does not match, it is 'Ball'. For example, if the right answer is - 1s 2b. - 0s 0b. - 1s 0b. - 2s 1b. - 0s 3b. - 4s.