#include <iostream>
#include <fstream>
using namespace std;

#ifdef LOCAL
#define fin cin
#define fout cout
#else
ifstream fin("chatnoir.in");
ofstream fout("chatnoir.out");
#endif

int main() {
	int t, n, m, x, y;
	fin >> t;
	while (t--) {
		fin >> n >> m >> x >> y;
		if (min(min(x - 1, n - x), min(y - 1, m - y)) <= 4)
			fout << "DA\n";
		else
			fout << "NU\n";
	}
}