#include <bits/stdc++.h>
#include <stdio.h>
#include <string.h>
#define ll long long
#define all(a) (a).begin(), (a).end()
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define sz() size()
#define fr first
#define sc second
#define pb push_back
#define er erase
#define in insert
#define pi pair<int,int>
#define pii pair<pair<int,int>,int>
#define mp make_pair
//#define int long long
#define rc(s) return cout<<s,0
#define rcc(s) cout<<s,exit(0)
///#define cin fin
///#define cout fout
using namespace std;
 
const int mod=1e9+7;

int t,n,a[100005];

int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
    srand(chrono::steady_clock::now().time_since_epoch().count());
    ifstream fin("nim.in");
    ofstream fout("nim.out");
    fin >> t;
    while(t--){
        fin >> n;
        for(int i=1;i<=n;i++) cin >> a[i];
        int ans=0;
        for(int i=1;i<=n;i++) ans=ans^a[i];
        if(ans>0) fout << "DA" << '\n';
        else fout << "NU" << '\n';
    }
}