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

    ans = 0
    for num in n:
        num = int(num)
        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
        else:
            ans += 4
    print(ans + 1)

main()