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: light, unprejudiced, honorable, fair, unjust

Ex Output:
light


Ex Input:
Category: aesthetic characteristic 
Words: fair, medium, size, light, loyal

Ex Output:
loyal


Ex Input:
Category: outdoor sport activity 
Words: swim, kayak, climbing, fish, bat

Ex Output:

bat