#include <fstream>
using namespace std;
int t,n,xs,a;
ifstream fin("nim.in");
ofstream fout("nim.out");
int main()
{
    fin>>t;
    while(t--)
    {
        fin>>n;
        xs=0;
        while(n--)
        {
            fin>>a;
            xs^=a;
        }
        if(xs)
            fout<<"DA\n";
        else
            fout<<"NU\n";
    }
    return 0;
}