Bulls and Cows game (1A1B)

The Bulls and Cows game, also known as 1A1B game.
The game is simple, all you need to do is figure out the different codes (0~9) and their position generated by game system.
When the code is correct and in its position, then the system will give you a Bull (1A).
If the code is correct but not in the right position, then the system will give you a Cow (1B).
Game system will tell you how many Bulls (1A) or Cows (1B) you got, right after your every guess.

1. Drag the numbers to the boxes and confirm.
2. First digit can not be 0.
3. Bulls (1A)= correct code, correct position.
4. Cows (1B)= correct code, wrong position.
5. Click Box below can help you lock the numbers.