def charset_alpha():
	return list("qwertyuiopasdfghjklzxcvbnm")
def charset_special():
	return list("+=%_,.<>{}[]!@#$/^&*()\\`~-:;,?")
def charset_mix():
	return list("qwertyuiopasdfghjklzxcvbnm+=%_<>{}[]!@#$/^&*()\\`~-:;,?.")