/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/* 
 * File:   main.cpp
 * Author: cteam025
 *
 * Created on October 28, 2017, 11:26 AM
 */

#include <cstdlib>
#include <iostream>

using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {
    ios::sync_with_stdio(false);
    
    while (cin.good()){
        
        int s;
        char letter;
        cin >> s >> letter;
        
        if (!cin.good()){
            return 0;
        }
        
        switch(letter){
            case 'N':
                if (s <= 2){
                    cout << 1 << endl;
                }else{
                    cout << 3 << endl;
                }
                break;

            case 'R':
                cout << s << endl;
                break;            
    
            case 'B':
                cout << s << endl;
            break;

            case 'K':
                if (s <= 1){
                    cout << 1 << endl;
                }else{
                    cout << 4 << endl;
                }
            break;
        
        
        }
        
        
        
        
    }
    
    
    
    return 0;
}