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

Ex Input:
Category: bird 
Words: crane, hoist, egret, tackle, ostrich

Ex Output:
hoist


Ex Input:
Category: animal 
Words: pounce, fly, swim, walk, walk

Ex Output:
walk


Ex Input:
Category: moral characteristic 
Words: ok, just, unjust, fair, warm

Ex Output:

warm