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: backward, south, down, forward, shameful

Output: shameful


Input: Consider Input: nervous, bored, emotional supports, chord, fret

Output: chord


Input: Consider Input: amp, angry, concerned, sad, fret


Output: amp