Given an array arr[] of N integers and a integer K, find the number of subsets of arr[] having XOR of elements as K.

**Input:**

The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consists of two lines. The first line of each test case contains two space separated integers N and K as described in the problem statement. Second line of each test case contains N space separated integers denoting the array arr[].

**Output:**

Corresponding to each test case, print a single line containing an integer denoting the total number of subsets of arr[] having XOR of thier elements as K.

**Constraints:**

1<=T<=10

1<=N<=20

1<=K<=100

0<=arr[i]<=100

**Example:**

**Input:**

1

4 6

6 9 4 2

**Output:**

2

**Explanation:**

The subsets are {4,2} and {6}

Author: pra1nay7_313

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