def solve():
    try:
        inp = input().split()
    except:
        return False
    n = int(inp[0])
    p = inp[1]
    if n == 1:
        print(1)
    elif p in 'RB':
        print(n)
    elif p == 'N' and n == 2:
        print(1)
    elif p == 'N':
        print(2)
    elif p == 'K':
        print(4)
    return True

while solve():
    pass