Given two non-negative numbers X and Y. The task is calculate the sum of X and Y. If the number of digits in sum (X+Y) are equal to the number of digits in X, then print sum, else print X.

**Input:**

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.

**Output:**

For each test case, print the required answer.

**Constraints:**

1<=T<=500

1<=|Digits in X,Y|<=100

**Example:**

**Input:**

2

25 23

100 1000

**Output:**

48

100

**EXPLANATION:**

TestCase2: Since 100+1000=1100 which has 4 digits while 100(i.e X) has only 3 digits.Hence our answer will be 100 as per the prob statement.

Author: arun03

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