digit_map = {
    '0': 2,
    '1': 3,
    '2': 2,
    '3': 2,
    '4': 3,
    '5': 2,
    '6': 4,
    '7': 3,
    '8': 4,
    '9': 3
}

n = input().strip()
total = 0
for c in n:
    total += digit_map[c]
print(total)