#include <bits/stdc++.h>
using namespace std;

int main() 
{
	int S;
	char C;
	while(cin >> S >> C)
	{
		int result = 0;
		switch(C)
		{
			case 'K':
				if(S == 1)
					result = 1;
				else
					result = 4;
			break;
			
			case 'N':
				if(S <= 2)
					result = 1;
				else 
					result = 2;
			break;
			
			case 'B':
				if(S == 1)
					result = 1;
				else
					result = 2;
			break;
			
			case 'R':
				result = S;
			break;
			default:
				throw "klepeto";
		}
		printf("%d\n", result);
	}
}