# include <fstream>
 
 using namespace std;
 
 ifstream f("chatnoir.in");
 ofstream g("chatnoir.out");
 
 int t, n, m, x, y;
 
 void rezolva()
 {
	 int min1 = 0, min2 = 0, min3 = 0, min4 = 0, minim = 0 ;
	 
	 min1 = n - x;
	 min2 = x - 1;
	 min3 = m - y;
	 min4 = y - 1;
	 
	 minim = min1;
	 
	 if ( minim > min2 )
		 minim = min2;

		 if ( minim > min3 )
			 minim = min3;
		
			 if ( minim > min4 )
				 minim = min4;
			 
			 //g << min1 << " " << min2 << " " << min3 << " " << min4 << "\n";
			 //g << minim << "\n";
			 
			 if ( minim <= 4 )
				 g << "DA" << "\n";
			 else
				 g << "NU" << "\n";
 }
 
 void citire()
 {
	 int i;
	 f >> t;
	 for ( i = 1 ; i <= t ; i++ )
	 {
		 f >> n >> m >> x >> y;
		 rezolva();
	 }
 }
 
 int main()
 {
	 citire();
	 return 0;
 }