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