Problem ID: year
You've been challenged to write a program that simulates a typical
three-year-old in an epic yes/no-battle with a grown-up. Making an artificial
intelligence for this is easy. If the grown-up says yes you reply no, and
if the grown-up says no you reply yes.
Write a program using this amazing technology for simulating such a three-year-old.
Input contains a single word, which is the word that the grown-up says. You may
assume this word is either yes or no.
Your program should output the three-year-old's reply to the grown-up.
yes
no
no
yes