#include <fstream>

using namespace std;

const char InFile[]="nim.in";
const char OutFile[]="nim.out";

ifstream fin(InFile);
ofstream fout(OutFile);

int T,N,S,x;

int main()
{
    fin>>T;
    for(int i=0;i<T;++i)
    {
        fin>>N;
        S=0;
        for(int j=0;j<N;++j)
            {
            fin>>x;
            S^=x;
            }
        if(!S)
            fout<<"NU\n";
        else
            fout<<"DA\n";
    }
    fin.close();
    fout.close();
    return 0;
}