Bulls and cows

Bulls and Cows, also known as 1A2B, is a number-related puzzle game that uses clues to guess a string of unique numbers in the correct order.
* If one number is guessed right and the position is correct, provide clue 1A. If two numbers are guessed right, provide clue 2A, etc.
* If one number is guessed right and the position is wrong, provide clue 1B. If two numbers are guessed right, provide clue 2B, and so on.
* If all numbers are guessed wrong, provide clue 0A0B.
The length of the number that can be guessed is as short as three and as long as eight.
You can challenge advanced gameplay, such as: limiting the number of guesses or tense time-limited gameplay.
More fun games will be added in the future.