#!/bin/python

def solve():
    inputt = list(input().split(" "))
    num = int(inputt[0])
    what = inputt[1]

    if what == "R":
        print(num)
    if what == "B":
        print(num)
    if what == "N":
        if num == 1 or num == 2:
            print(1)
        else:
            print(2)
    if what == "K":
        if num == 1:
            print(1)
        else:
            print(4)
        
        

def main():
    try:
        while True:
            solve()
    except:
        pass

main()