#include<fstream>
using namespace std;

int main(void){
    ifstream fin("chatnoir.in");
    ofstream fout("chatnoir.out");
    int t,n,m,x,y;
    fin>>t;
    while(t--){
               fin>>n>>m>>x>>y;
               if(x<5 || y<5 || n-x<4 || m-y<4)fout<<"DA"<<'\n';
                 else fout<<"NU"<<'\n';
               }
 fin.close(); fout.close();                
 return 0;   
}