#include<fstream>
using namespace std;
ifstream in("nim.in");
ofstream out("nim.out");
int main()
{
    int j,i,t,n,x,s;
    in>>t;
    for(i=1;i<=t;i++)
    {
        in>>n;
        s=0;
        for(j=1;j<=n;j++)
        {
            in>>x;
            s=s^x;
        }
        if(s)
            out<<"DA"<<'\n';
        else
            out<<"NU"<<'\n';
    }
    in.close();
    out.close();
    return 0;
}