#include <stdio.h>

int main() {

	int result;
	int size;
	char role;

	while (scanf("%d %c",&size,&role) > 0) {
		if(role == 'N' && size < 3){
			result = 1;
		} else
		if(role == 'N' && size > 2){
			result = 2;
		} else
		if(role == 'B' || role == 'R'){
			result = size;
		} else		
		if(role == 'K' && size == 1){
			result = 1;
		} else		
		if(role == 'K' && size > 1){
			result = 4;
		}
		printf("%d\n",result);	
	}

	return 0;
}