#include<stdio.h>
#include<assert.h>

int n,m,x,y,t;

void solve()
{
    assert(freopen("chatnoir.in","r",stdin)!=NULL);
    assert(freopen("chatnoir.out","w",stdout)!=NULL);
    scanf("%d",&t);
    int i;
    for(i=1;i<=t;++i)
    {
        scanf("%d%d%d%d",&n,&m,&x,&y);
        if((n-x-1<4)||(m-y-1)<4||(y<5)||(x<5))
            printf("DA\n");
        else
            printf("NU\n");
    }
}

int main()
{
    solve();
    return 0;
}