#include <fstream>

using namespace std;
ifstream in("nim.in");
ofstream out("nim.out");
int main()
{
    int t,n,i,j,r,a;
    in>>t;
    for(i=1; i<=t; i++)
    {
        in>>n>>a;
        r=a;
        for(j=1; j<n; j++)
        {
            in>>a;
            r^=a;
        }
        if(r)
            out<<"DA\n";
        else
            out<<"NU\n";
    }
    return 0;
}