29.27

Given an array Arr[] of N integers. Write a program to find out number of pairs in array whose XOR is odd.

**Input:**

First line of input contains a single integer T which denotes the number of test cases. Then T test cases follows. First line of each test case contains a single integer N which denotes the size of array. Second line of each test case contains N space separated integers which denotes the elements of the array.

**Output:**

For each test case print the number of pairs in array whose XOR is odd.

**Constraints:**

1<=T<=100

1<=N<=1000

1<=Arr[i]<=1000

**Example:
Input:**

2

3

1 2 3

4

1 2 3 4

2

4