#include <bits/stdc++.h>

using namespace std;

int main() {
	ios::sync_with_stdio(false);
	
	int n;
	char ch;
	int ret;
	
	while(scanf("%d %c\n", &n, &ch) == 2) {
	  if(ch == 'K'){
	    if(n==1) ret = 1;
	    else ret = 4;
	  }
	  if(ch == 'B' || ch == 'R'){
	    ret = n;
	  }
	  if(ch == 'N'){
	    if(n<=2) ret = 1;
	    else ret = 2;
	  }
	  cout << ret << "\n";
	}
	return 0;
}