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: dump truck, pelican, goose, crane, derrick

Ex Output:
dump truck


Ex Input:
Category: body part 
Words: inch, head, foot, ear, finger

Ex Output:
inch


Ex Input:
Category: location (proximity) 
Words: close, nearer, shut, on top of, nearest

Ex Output:

shut