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.

Example Input: bored, amp, board, fret, truss rod
Example Output: bored

Example Input: duck, bend, ostrich, jog, stoop
Example Output: ostrich

Example Input: bright, well, fine, alert, annoyed
Example Output:
bright