#include <fstream>
#define NMAX 10005

using namespace std;

ifstream f("nim.in");
ofstream g("nim.out");

int i, n, nrquiz, el, s;

int main()
{
    f >> nrquiz;

    while (nrquiz)
    {
        nrquiz --;

        f >> n;
        s = 0;

        for (i = 1; i <= n; ++ i)
        {
            f >> el;
            s ^= el;
        }

        if (s > 0)
            g << "DA" << '\n';
        else
            g << "NU" << '\n';
    }
    return 0;
}