def main():
    n = str(input())

    ans = 0
    for num in n:
        if num == '1' or num == '2'or num == '3' or num == '5' or num == '7':
            ans += 2
        elif num == '0' or num == '4' or num == '6' or num == '9':
            ans += 3
        elif num == '8':
            ans += 4
    print(ans + 1)

main()