($H,$W)=glob<>;
<>;
for(reverse<>){
	($S,$K)=split;
	if($S eq'R'){
		if($K==$y){
			$x=($x-1)%$W
		}
	}else{
		if($K==$x){
			$y=($y-1)%$H
		}
	}
}
print$x+$y&1?black:white