def func1(a):	
	adic = {1:['a','d','g','j','m','p','t','w',' '],2:['b','e','h','k','n','q','u','x'],3:['c','f','i','l','o','r','v','y'],4:['s','z']}
	for n in range(1,5):
		if a in adic[n]:
			return n
			break
astr = input()
length = len(astr)
sum = 0
for n in range(0,length):
	aa = func1(astr[n])
	sum += aa
print(sum)