Bulls And Cows / Guess Number

2017/6/1:
Add a new version of the Bluetooth game, you can link to the bottom:
Https://play.google.com/store/apps/details?id=tw.com.badsupldn2017.baduser2017_1a2b

How to play:
1. Input a random numbers but not duplicated
2. You will get a hint by ?A?B, A means right position and right number, B means wrong position but right number.

For example: input 1234, you got 1A1B ,
It means you got 2 numbers, but one is in right position, the other isn't.

Function:
1. 3 - 8 digits length selectable
2. Press the restart bottom, then new game starts.