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: outdoor sport activity 
Words: fish, hiking, row, shark, canoe

Ex Output:
shark


Ex Input:
Category: temperature 
Words: cold, cool, icy, assured, mild

Ex Output:
assured


Ex Input:
Category: boxing terminology 
Words: jab, blocking, deck, galley, apron

Ex Output:

galley