Description: In every generation there is a Chosen One. She alone will stand against the vampires, the demons, and the forces of darkness. She is the Slayer. — Joss Whedon Input Format: A string $$$s$$$ ($$$3 \le |s| \le 7$$$) consisting of lowercase English letters. Output Format: A single string. If there is no answer, print "none" (without the quotes). Note: None