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

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

main()