输入描述:

First line an Integer N means n test cases.
Next 2N lines representing 2N groups of different Integers.
N<50.
THE LENGTH of every Integer will less than 5000.
All Integers will be greater than 0.
Some cases may have leading zero.

输出描述:

One line for each test cases reprecenting the answer of A+B.
Do not putout leading zero

备注:

You do not have to use FFT.