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: fine, ticket, dull, neat, detailed

Ex Output:
ticket


Ex Input:
Category: chocolate food 
Words: cake, fudge, rich, invent, cream

Ex Output:
invent


Ex Input:
Category: body part 
Words: arm, foot, ankle, finger, centimeter

Ex Output:

centimeter