A+B Coming 程序的设计 5C

Problem Description
Many classmates said to me that A+B is must needs.
If you can’t AC this problem, you would invite me for night meal. ^_^

Input
Input may contain multiple test cases. Each case contains A and B in one line.
A, B are hexadecimal number.
Input terminates by EOF.

Output
Output A+B in decimal number in one line.

Sample Input
1 9
A B
a b

Sample Output
10
21
21

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