$ax=2;$ay=8;
$bx=3;$by=9;
$cx=7;$cy=9;
<>;
while(<>){
	($x0,$y0,$x1,$y1)=glob;
	if($ax==$x0&&$ay==$y0){$ax=$x1;$ay=$y1;}
	if($bx==$x0&&$by==$y0){$bx=$x1;$by=$y1;}
	if($cx==$x0&&$cy==$y0){$cx=$x1;$cy=$y1;}
}
print $ax==5&&$ay==8&&$bx==4&&$by==8&&$cx==6&&$cy==8?YES:NO