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: location (proximity) 
Words: on top of, touching, finished for the day, close, right there

Ex Output:
finished for the day


Ex Input:
Category: construction 
Words: digger, concrete pourer, crane, derrick, excavator

Ex Output:
derrick


Ex Input:
Category: aesthetic characteristic 
Words: milky, clime, pale, fair, light

Ex Output:

clime