Reversed number is a number written in arabic numerals but the order of digits is reversed. The first digit becomes last and vice versa. And all the leading zeros are omitted.
For example: the reversed number of 1234 is 4321. The reversed number of 1000 is 1.

We define reversed number of as . Given you two positive integers and , you need to calculate the reversed sum: .

The first line of the input gives the number of test cases, .  test cases follow.

For each test case, the only line contains two positive integers: and . ()

For each test case, output a single line indicates the reversed sum.

3
12 1
101 9
991 1

22
11
2