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#include <iostream>
#include <fstream>
using namespace std;
ifstream f1("nim.in");
ofstream f2("nim.out");
int t,n, config[10005];
void solve(){
int suma = 0;
for(int i=0;i<n;i++){
suma = suma ^ config[i];
}
if(suma == 0){
f2<<"NU"<<"\n";
return;
}
f2<<"DA"<<"\n";
}
int main() {
f1>>t;
for(int i=0;i<t;i++){
f1>>n;
for(int j=0;j<n;j++){
f1>>config[j];
}
solve();
}
return 0;
}