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