/*
 * 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: cteam007
 *
 * Created on October 28, 2017, 10:35 AM
 */

#include <bits/stdc++.h>

using namespace std;

int n;
string st;

/*
 * 
 */
int main() {
    while(cin>>n)
    {
        cin>>st;
        if(st=="B" || st=="R")
        {
            cout << n << endl;
        }
        else if(st=="K")
        {
            if(n==1){
                cout << "1" << endl;
            }
            else{
                cout << "4" << endl;
            }
        }
        else if(st=="N"){
            if(n==1 || n == 2){
                cout << "1" << endl;
            }
            else if(n>=3){
                cout << "2" << endl;
            }
        }
        
    }
    
    
    return 0;
}