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: ostrich, hoist, egret, crane, parrot
Example Output: hoist

Example Input: provision, fortitude, frank, brash, honest
Example Output: provision

Example Input: valley, house, cabin, squashed, flat
Example Output:
valley