a, b,c,d,e=map(str,input().split())
mySeq = [a,b,c,d,e]  
i=0
c=0
for i in range(0,5):
    if mySeq[i]=="A":
        c=c+1
    if mySeq[i]=="B":
        c=c+2
    if mySeq[i]=="C":
        c=c+3
    if mySeq[i]=="D":
        c=c+4
print(c)