Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Input: Consider Input: kind, down, sad, backward, emotionalities

Output: backward


Input: Consider Input: cool, unruffled, funny, chill, ethical

Output: chill


Input: Consider Input: pick, amp, fret, frustrated, strap lock


Output: frustrated