#!/usr/bin/python3

# generate_C_lang_token.py
#
# Author: Intel A80486DX2-66
# License: Unlicense

from random import choice
from string import ascii_lowercase, ascii_uppercase, digits
from sys import argv, stdin

first_char_alphabet = ascii_uppercase + ascii_lowercase
alphabet = first_char_alphabet + digits + "_"

random_token = lambda n: \
	"".join( \
		[choice(first_char_alphabet)] + \
        [choice(alphabet) for i in range(n - 1)]) if (n := int(n)) > 0 else ""

if "-" in argv[1:] and stdin:
    print(random_token(list(stdin)[0]))
else:
    print("Random token:", random_token(input("Token length? ")))