def main():
    N = list(input())

    count = 1
    for n in N:
        if n in ("1","2","3","5","7"):
            count += 2
        elif n in ("0","4","6","9"):
            count += 3
        elif n == "8":
            count += 4

    print(count)


if __name__ == "__main__":
    main()