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: moral characteristic 
Words: just, make the grade, well, unjust, fair

Ex Output:
make the grade


Ex Input:
Category: elements 
Words: ice, fire, burn, let go, combustion

Ex Output:
let go


Ex Input:
Category: weather 
Words: mild, cold, luke, fair, texture

Ex Output:

texture