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#include <iostream>
#include <fstream>
#include <map>
using namespace std;
ifstream f ("nim.in");
ofstream g ("nim.out");
int xors , n , i , k , a;
int main()
{
f >> n;
for (int i = 1 ; i <= n ; i++)
{
f >>k;
xors = 0;
for (int j = 1 ; j <= k ; j++)
f >> a , xors = xors ^ a;
if (xors)
g <<"DA" << '\n';
else
g << "NU" <<'\n';
}
return 0;
}