The problem is to count all the possible paths from top left to bottom right of a MxN matrix with the constraints that from each cell you can either move to right or down.
The first line of input contains an integer T, denoting the number of test cases.
The first line of each test case is M and N, M is number of rows and N is number of columns.
For each test case, print the number of paths.
1 ≤ T ≤ 30
1 ≤ M,N ≤ 10