import random


def random_key(length):
    characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
    return ''.join(random.choice(characters) for i in range(length))


inp = input('password length: ')
if inp != '':
    inp = int(inp)
    print('your random password is:\n' + random_key(inp))
else:
    print('your random password is:\n' + random_key(8))