469. Bulls and Cows

MediumCounting

Bulls are digits in the right position; cows are digits present in the secret but in the wrong position (each secret digit counts once). Print the hint as xAyB.

Input format

Line 1: secret Line 2: guess (same length)

Output format

xAyB

Example 1

Input

1807
7810

Output

1A3B

Example 2

Input

1123
0111

Output

1A1B

Constraints

1 ≤ length ≤ 1000

Read input from standard input and print the answer to standard output. Your code is judged against 4 test cases, most of them hidden.

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