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: elements 
Words: fire, earth, water, blaze, recruit

Ex Output:
recruit


Ex Input:
Category: animal 
Words: fly, dangle, bee, jump, flap

Ex Output:
flap


Ex Input:
Category: ocean 
Words: course, wave, tide, detestings, current

Ex Output:

detestings