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: ocean 
Words: current, data sets, main, sea, wave

Ex Output:
data sets


Ex Input:
Category: aesthetic characteristic 
Words: pale, ghostly, 70, flaxen, fair

Ex Output:

70