## 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 !

## Input:

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.

## Output:

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