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: hot, there, detailed, fine, probation

Ex Output:
probation


Ex Input:
Category: elements 
Words: ground, replace, combustion, flame, fire

Ex Output:
replace


Ex Input:
Category: moral characteristic 
Words: light, unprejudiced, honorable, fair, unjust

Ex Output:

light