#!/usr/bin/python3

import sys
import random

def gen(length=16):
    password = ""
    for i in range(length):
        password += chr(random.randint(33,127))
    return password

if __name__ == "__main__":
    if len(sys.argv) == 2:
        print(gen(int(sys.argv[1])))
    else:
        print(gen())