#!/usr/bin/python
s=0
j=raw_input()
a,b,c,d,e = j.split()
list=[a,b,c,d,e]
for i in range(0,5):
    if list[i]=='A':
        s=s+1
    elif list[i]=='B':
        s=s+2
    elif list[i]=='C':
        s=s+3
    elif list[i]=='D':
        s=s+4
print s