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A + B Again

Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 56323    Accepted Submission(s): 23097

Problem Description
There must be many A + B problems in our HDOJ , now a new one is coming.
Give you two hexadecimal integers , your task is to calculate the sum of them,and print it in hexadecimal too.
Easy ? AC it !

The input contains several test cases, please process to the end of the file.
Each case consists of two hexadecimal integers A and B in a line seperated by a blank.
The length of A and B is less than 15.

For each test case,print the sum of A and B in hexadecimal in one line.

Sample Input
+A -A +1A 12 1A -9 -1A -12 1A -AA

Sample Output
0 2C 11 -2C -90



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