#include <cstdio>

using namespace std;

int main()
{
    int T,N,M,X,Y;
    freopen ("chatnoir.in","r",stdin);
    freopen ("chatnoir.out","w",stdout);
    scanf("%d", &T);
    while(T--)
    {
        scanf("%d%d%d%d", &N,&M,&X,&Y);
        if(X<=4 || X>=N-3 || Y<=4 || Y>=M-3)
            printf("DA\n");
        else
            printf("NU\n");
    }
    return 0;
}