word = input()
answer = 0
if len(word)<=200:
    for i in word:
        if i in ' adgjmptw':
            num = 1
        elif i in 'behknqux':
            num = 2
        elif i in 'cfilorvy':
            num = 3
        elif i in 'sz':
            num = 4
        answer += num
print(answer)