GUESSNUM by worjim

The computer has chosen 4 numbers between 1 and 9 (There are no duplicates)
You have to guess what the numbers are.
You have up to 10 tries to get the correct 4-number answer.
After you'ved typed 4 numbers (for each try), the C-M-X boxes show how you're doing.

C- shows the number of correct entries in the correct position
M- shows the number of correct entries that need to be moved to a different position.
X- shows the number of incorrect entires.