Give you two hexadecimal numbers, your task is to calculate the sum of them, and print it in hexadecimal too. Easy ? AC it !

**Multiple test cases, please process to the End Of File.** Each test case occupies one line, contains two hexadecimal numbers $A$ and $B$, separated by a blank. It is guaranteed that 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.

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