#include <string>
#include <iostream>
#include <vector>


int main() {
	using namespace std;
	ios::sync_with_stdio(false);
	size_t n = 0;
	while (cin >> n) {
		
		char t;
		cin >> t;
		size_t res = 0;
		switch (t) {
			case 'N': if (n <= 2) { res = 1;} else { res = 2;} break;
			case 'R': 
			case 'B': res = n; break;
			case 'K': if (n == 1) { res = 1;} else { res = 4;} break;
		}
		cout << res << endl;
		


	}
	return 0;
}