#include <iostream>
#include <cstdio>
#include <vector>
#include <fstream>
#include <string>
#include <algorithm>

using namespace std;

void solve()
{
  int n, m, x, y;
  scanf("%d %d %d %d\n", &n, &m, &x, &y);

  if (min(n - x, x - 1) <= 2 || min(m - y, y - 1) <= 2)
    printf("DA\n");
  else
    printf("NU\n");

}
int main()
{
  freopen("chatnoir.in", "r", stdin);
  freopen("chatnoir.out", "w", stdout);

  int t;

  scanf("%d", &t);

  for (int i = 0; i < t; ++i)
    solve();

  return 0;
}