单点时限: 2.0 sec
内存限制: 256 MB
Give two positive integer $A$ and $B$, calucate $A+B$.
Notice that $A,B$ is no more than $500$ digits.
The test case contain several lines. Each line contains two positive integer $A$ and $B$.
For each input line, output a line contain $A+B$.
2 3 1231231231823192 123123123123123 1000000000000000 1
5 1354354354946315 1000000000000001