list1 = raw_input().strip().split()


i=0
s=0
for i in range(len(list1)):
	if list1[i]=='A':
		s=s+1
	if list1[i]=='B':
		s=s+2
	if list1[i]=='C':
		s=s+3
	if list1[i]=='D':
		s=s+4
print s