import string
import random


def strong_pass():
    pass_len = 20
    poss_char = string.ascii_letters + string.digits + string.punctuation
    return ''.join(random.choices(poss_char, k=pass_len))


def weak_pass():
    with open('16.words_alpha.txt', "r") as dict_words:
        words = [word.strip() for word in dict_words.readlines()]
    return ' '.join(random.sample(words, 2))


def get_mode():
    while True:
        input_text = "Type 'w' for a weak password or 's' for a strong one: "
        tmp = input(input_text).lower()
        if tmp in ['w', 's']:
            return tmp


def main():
    tmp = get_mode()
    if tmp == "w":
        print(weak_pass())
    else:
        print(strong_pass())


if __name__ == '__main__':
    main()