#include <cstdio>
#include <cstring>

#include <vector>

using namespace std;

int main() {
	for (;!feof(stdin);) {
		int S; char t;
		if (scanf("%d %c", &S, &t) != 2)
			break;
		switch (t) {
			case 'K': printf("%d\n", (S==1)?1:4); break;
			case 'N': printf("%d\n", (S==1)?1:((S==2) ? 1 : 2)); break;
			case 'B': printf("%d\n", S); break;
			case 'R': printf("%d\n", S); break;
			}
			}
			}