Given two arrays of integers, write a program to check if a pair of values (one value from each array) exists such that swapping the elements of the pair will make the sum of two arrays equal.
First line of input contains a single integer T which denotes the number of test cases. T test cases follows. First line of each test case contains two space separated integers N and M. Second line of each test case contains N space separated integers denoting the elements of first array. Third line of each test case contains M space separated integers denoting the elements of second array.
For each test case, print 1 if there exists any such pair otherwise print -1.
1 <= T <= 100
1 <= N <= 104
1 <= M <= 104
0 <= elements <= 104
4 1 2 1 1 2
3 6 3 3
5 7 4 6
1 2 3 8
Testcase 1: 1 and 3 are two such values one from first array other from second one, if we swap these two values then we will get both arrays sum as equal.
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