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#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
int t, n, a[10050];
void solve()
{
int rez=0;
for(int i=0; i<n; i++){
rez = rez^a[i];
}
if(rez!=0)
printf("DA\n");
else
printf("NU\n");
}
int main()
{
freopen("nim.in", "r", stdin);
freopen("nim.out", "w", stdout);
scanf("%d", &t);
for(int i=0; i<t; i++){
scanf("%d", &n);
for(int j=0; j<n; j++)
scanf("%d", &a[j]);
solve();
}
return 0;
}