#include<cstdio>using namespace std;bool judge(int &w){    int wl,dl,wr,dr;    scanf("%d%d%d%d",&wl,&dl,&wr,&dr);    bool l=true,r=true;    if(!wl) l=judge(wl);    if(!wr) r=judge(wr);    w=wl+wr;    return l && r && wl*dl==wr*dr;}int main(){    int T,w;    scanf("%d",&T);    while(T--)    {        if(judge(w)) printf("YES\n");        else printf("NO\n");        if(T) puts("");    }}