#include <fstream>

using namespace std;

int main()
{
	ifstream cin("chatnoir.in");
	ofstream cout("chatnoir.out");

    int t,n,m,x,y;
    cin>>t;

    for(int i=0;i<t;i++)
	{
		cin>>n>>m>>x>>y;

		if(min(min(x-1, n-x), min(y-1, m-y))<4)
			cout<<"DA"<<'\n';
		else
			cout<<"NU"<<'\n';
	}


    return 0;
}