#include <bits/stdc++.h>
using namespace std;
using uint = unsigned int;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    uint T;
    cin >> T;
    while(T--){
        uint n, m;
        cin >> n >> m;
        vector<uint> a(n);
        for(auto &&v : a) cin >> v;
        uint S = (1 << m) - 1, d = n - m;
        if(n > m){
            vector<uint> b(m);
            for(int i = 0; i < m; i++){
                for(int j = 0; j <= d; j++){
                    b[i] ^= ((d & j) == j ? a[i + j] & 1 : 0);
                }
            }
            swap(a, b);
        }
        while(a.size() >= 2){
            for(int i = 0; i + 1 < a.size(); i++){
                a[i] = (a[i] + a[i + 1]) * (a[i] + a[i + 1]) & S;
            }
            a.pop_back();
        }
        cout << a[0] << '\n';
    }
}