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: type of sandwich 
Words: dagwood, club, doorstep, hamburger, community

Ex Output:
community


Ex Input:
Category: outdoor sport activity 
Words: fish, hike, hunting, row, dog

Ex Output:
dog


Ex Input:
Category: animal 
Words: fly, walk, grasshopper, dive, waggle

Ex Output:

walk