#include <bits/stdc++.h>

using namespace std;

int main () {
    ifstream fin ( "chatnoir.in" );
    ofstream fout ( "chatnoir.out" );
    ios_base :: sync_with_stdio ( 0 );
    cin.tie ( 0 );
    cout.tie ( 0 );
    int t , i , n , m , x , y;

    fin >> t;
    for ( i = 1 ; i <= t ; i++ ) {
        fin >> n >> m >> x >> y;
        if ( min ( min ( n - x , m - y ) , min ( x - 1 , y - 1 ) ) <= 4 )
            fout << "DA";
        else
            fout << "NU";
        fout.put ( '\n' );
    }
    return 0;
}