4A

The goal of the game is to guess the opponent's digit number. For this you get two hints to what extent your guess was correct:

- A tells you how many digits are correct and in the correct place.

- B tells you how many digits are correct but in the wrong place.

Let's take an example:

The number you are looking for is 1234. Your attempt is 1245. The clue from this is: 2A1B

Explanation:

2A (the digits 1 and 2 are correct and in the right place in the number).

1B (the digit 4 is correct but in the wrong place in the number).

So you have won if the result is 4A.