#include <bits/stdc++.h>
using namespace std;
int readInt(FILE *fin) {
    int x;
    char ch;
    ch = fgetc(fin);
    while (isspace(ch)) {
        ch = fgetc(fin);
    }
    x = 0;
    while (isdigit(ch)) {
        x = x * 10 + ch - '0';
        ch = fgetc(fin);
    }
    return x;
}
int main()
{
    FILE *fin, *fout;
    int n, i, t1, i1, rez, x;
    fin = fopen("nim.in", "r");
    t1 = readInt(fin);
    fout = fopen("nim.out", "w");
    for (i1 = 0; i1 < t1; i1++) {
        n = readInt(fin);
        rez = 0;
        for (i = 0; i < n; i++) {
            x = readInt(fin);
            rez ^= x;
        }
        if (rez > 0) {
            fprintf(fout, "DA\n");
        } else {
            fprintf(fout, "NU\n");
        }
    }
    fclose(fin);
    fclose(fout);
    return 0;
}