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#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
int main()
{
freopen("nim.in", "r", stdin);
freopen("nim.out", "w", stdout);
int n,t, current, xorSum;
scanf("%d", &t);
for (int i=0; i<t; i++){
scanf("%d", &n);
xorSum = 0;
for (int j=0; j<n; j++){
scanf("%d", ¤t);
xorSum = xorSum ^ current;
}
if (xorSum == 0){
printf("NU\n");
} else {
printf("DA\n");
}
}
return 0;
}