#include<fstream>
#include<iostream>

using namespace std;

ifstream f("chatnoir.in");
ofstream h("chatnoir.out");
int i, t, x[100010], y[100010], n[100010], m[100010];

int main()
{
	f>>t;
	for (i=1; i<=t; i++)
		f>>n[i]>>m[i]>>x[i]>>y[i];
	f.close();
	
	for (i=1; i<=t; i++)
		if (x[i]==1)
			h<<"DA"<<'\n';
		else
			if (x[i]==n[i])
				h<<"DA"<<'\n';
			else
				if (y[i]==1)
					h<<"DA"<<'\n';
				else
					if (y[i]==m[i])
						h<<"DA"<<'\n';
					else
						if (((n[i]-x[i])<(n[i]/2))&& ((m[i]-y[i])<(m[i]/2)))
							h<<"DA"<<'\n';
						else
							h<<"NU"<<'\n';
	h.close();
	return 0;
}