str=input()
num=0#用来统计按了几次
one=['a','d','g','j','m','o','t','w']
two=['b','e','h','k','n','q','u','x']
three=['c','f','i','l','o','r','v','y']
four=['z']
for i in str:
    if i==' ':
        num+=1
str1=str.replace(' ','')
for j in str1:
    if j in one:
        num+=1
    elif j in two:
        num+=2
    elif j in three:
        num+=3
    elif j in four:
        num+=4
    elif j =='\n' or j=='\r':
        num+=0
print(num)