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#include <iostream>
#include <fstream>
using namespace std;
int main(){
ifstream fin("nim.in");
ofstream fout("nim.out");
int cases, nr, num_per_gr,v[100];
fin >> cases;
for(int i = 0; i < cases; i++){
fin >> nr;
for(int j = 0; j < nr; j++){
fin >> num_per_gr;
v[j] = num_per_gr;
}
int rez = 0;
for(int k = 0; k < nr; k++){
rez = rez ^ v[k];
}
if (rez != 0){
fout <<"DA"<<'\n';
}else{
fout <<"NU"<<'\n';
}
}
return 0;
}