#include<fstream>
using namespace std;
int n,m,x,y,t,m1,m2,m3,m4,i;
int main()
{
    ifstream f("chatnoir.in");
    ofstream g("chatnoir.out");
    f>>t;
    for(i=1;i<=t;i++)
    {
        f>>n>>m>>x>>y;
        m1=x-1+y-1;
        m2=x-1+m-y;
        m3=n-x+y-1;
        m4=n-x+m-y;
        if(m1<=4||m2<=4||m3<=4||m4<=4)
        g<<"DA\n";
        else
        g<<"NU\n";
    }
    return 0;
}