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#include <iostream>
using namespace std;
int main()
{
int t, n;
FILE* fi = fopen("nim.in", "r");
FILE* fo = fopen("nim.out", "w");
fscanf(fi,"%d", &t);
int i;
for(i = 0; i < t; i++)
{
int s = 0;
int x,j;
fscanf(fi,"%d", &n);
for(j = 0; j < n; j++)
{
fscanf(fi,"%d", &x);
s = s^x;
}
if(s == 0) fprintf(fo,"NU\n");
else fprintf(fo,"DA\n");
}
fclose(fi);
fclose(fo);
return 0;
}