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: flamingo, crane, neck, ostrich, davit

Ex Output:
davit


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

Ex Output:
alright


Ex Input:
Category: bird 
Words: davit, dump truck, goose, crane, sandpiper

Ex Output:

dump truck