word = input().strip()
time = 0
for char in word:
if 'A' <= char <= 'C':
time += 3
elif 'D' <= char <= 'F':
time += 4
elif 'G' <= char <= 'I':
time += 5
elif 'J' <= char <= 'L':
time += 6
elif 'M' <= char <= 'O':
time += 7
elif 'P' <= char <= 'S':
time += 8
elif 'T' <= char <= 'V':
time += 9
elif 'W' <= char <= 'Z':
time += 10
print(time)