#!/user/bin/python
# -*- coding: UTF-8 -*-
a = map(str, raw_input().strip().split(' '))
s=0
for i in range (0,5):
    if a[i]=="A":s=s+1
    if a[i]=="B":s=s+2
    if a[i]=="C":s=s+3
    if a[i]=="D":s=s+4
print s