a,b,g,d,e=raw_input().split()
list=[a,b,g,d,e]
i=c=0
while i<5:
    if list[i]=='A':
     c=c+1
    elif list[i]=='B':
     c=c+2
    elif list[i]=='C':
     c=c+3
    elif list[i]=='D':
     c=c+4
    i=i+1
else:
    print c