#include <fstream>

using namespace std;

int main()
{
    ifstream f ("chatnoir.in");
    ofstream g ("chatnoir.out");
    int t,n,m,x,y;
    f>>t;
    for (int i=0;i<t;i++)
    {
        f>>n>>m>>x>>y;
        if (((n-x)<4)||((m-y)<4))
            g<<"DA\n";
        else
            g<<"NU\n";
    }
    return 0;
}