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: animal 
Words: bus, leap, spider, run, fly

Ex Output:
bus


Ex Input:
Category: baby animals 
Words: fawn, bambi, calf, love, kid

Ex Output:

love