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: aesthetic characteristic 
Words: fair, unprejudiced, level, tone, milky

Ex Output:
unprejudiced


Ex Input:
Category: outdoor sport activity 
Words: swim, wrestle, fish, canyoning, horse

Ex Output:
horse


Ex Input:
Category: construction 
Words: upraise, crane, tackle, flamingo, digger

Ex Output:

flamingo