Given two non-negative numbers X and Y. The task is calculate the sum of X and Y.
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case contains two numbers X and Y.
For each test case, if the number of digits in sum (X+Y) are equal to the number of digits in X, then print sum, else print X.
1<=|Number length |<=100