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.

Example Input: Category: type of sandwich 
Words: french toast, community, club, burger, dagwood
Example Output: community

Example Input: Category: activity 
Words: fritter, waste, pie, waste away, lollygag
Example Output: pie

Example Input: Category: animal 
Words: bee, soar, bird, walk, fly
Example Output:
soar