After dating for a long time, Akhil is finally going to propose to his girlfriend. She is very strong in mathematics, and will accept his proposal, if and only if Akhil solves a problem given by her. The problem is given below. Help Akhil solve it.

Akhil is given two numbers N and M, and he has to tell her the remainder when is divided by .

Input Format
The first line contains an integer i.e. the number of test cases.
Each of the next lines contain two space separated integers, and .

Output Format
lines each containing ouptut for the corresponding test case.

Constraints

Sample Input 00

3
3 3
4 7
5 18

Sample Output 00

0
5   
5

Explanation

111 % 3 = 0
1111 % 7 = 5
11111%18 = 5