#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
	int T;
	cin>>T;
	while(T--){
		int N,M;
		cin>>N>>M;
		vector<int> A(N);
		for(int i=0;i<N;i++) cin>>A[i];
		if(N <= 2*M){
			vector<int> B = {};
			for(int x:A) B.emplace_back(x);
			while(B.size() != 1){
				vector<int> C = {};
				for(int i=1;i<B.size();i++) C.emplace_back((B[i]+B[i-1])*(B[i-1]+B[i])%(1<<M));
				B = C;
			}
			cout<<B[0]<<endl;
			continue;
		}
		vector<int> C(M);
		for(int i=0;i<M;i++)for(int j=i;j<=N-M+i;j++)if(((N-M)&(j-i)) == j-i && A[j]%2) C[i] = (C[i]+1)%2;
		vector<int> D = {};
		for(int x:C) D.emplace_back(x);
		for(int i=2;i<=M;i++){
			vector<int> E = {};
			for(int j=1;j<D.size();j++) E.emplace_back((D[j-1]+D[j])*(D[j-1]+D[j])%(1<<i));
			D = E;
		}
		cout<<D[0]<<endl;
	}
}