A + B Again

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.

+A -A
+1A 12
1A -9
-1A -12
1A -AA

0
2C
11
-2C
-90

linle

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