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, tackle, crane, hoist, davit

Ex Output:
dump truck


Ex Input:
Category: shady activities 
Words: invent, smuggled, smear, fudge, pie

Ex Output:
pie


Ex Input:
Category: construction 
Words: hoist, concrete pourer, excavator, crane, goose

Ex Output:

goose