#include <fstream>
#include <algorithm>
#include <random>
#include <vector>
#include <map>
using namespace std;

ifstream cin("nim.in");
ofstream cout("nim.out");

void solve(){
    int n;
    cin>>n;
    int sol=0;
    for(int i=1;i<=n;i++){
        int x;
        cin>>x;
        sol=(sol^x);
    }
    if(sol==0){
        cout<<"NU\n";
    }
    else{
        cout<<"DA\n";
    }
}

int main(){
    int t;
    cin>>t;
    while(t--){
        solve();
    }
}