#include <iostream>
#include <fstream>
using namespace std;
ifstream in("chatnoir.in");
ofstream out("chatnoir.out");

void solve()
{
    int n, m, x, y;
    in >> n >> m >> x >> y;
    if(x >= 5 && y >= 5 && x < n - 4 && y < n - 4)
        out << "NU";
    else
        out << "DA";
    out << "\n";
}

int main()
{
    int T;
    in >> T;
    for(int i = 1; i <= T; i++)
        solve();
    return 0;
}