#include<bits/stdc++.h>
using namespace std;
int main(){
	char a[10],b,c,d,e,f,fl1=0,fl2=0;
	for(int i=1;i<=8;i++){
		cin>>a[i];
		if(a[i]=='K') b=i;
		if(a[i]=='B'){
			if(fl1==0){
				fl1=1;
				c=i;
			}else d=i;
		}if(a[i]=='R'){
			if(fl2==0){
				fl2=1;
				e=i;
			}else f=i;
		}
	}if(e<b&&b<f&&abs(c-d)%2) cout<<"Yes";
	else cout<<"No";
	return 0;
}