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: mode of transportation 
Words: beetle, fly, soar, bus, car

Ex Output:
beetle


Ex Input:
Category: aesthetic characteristic 
Words: variety, fair, alright, pale, flaxen

Ex Output:
alright


Ex Input:
Category: animal 
Words: stingray, fish, raft, mice, whale

Ex Output:

raft