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: corporate 
Words: leverage, solid, firm, amalgamated, concerted

Ex Output:
solid


Ex Input:
Category: secretary duty 
Words: organize, support, text, sort mail, file

Ex Output:
text


Ex Input:
Category: weather 
Words: deal, endure, cool, luke, fair

Ex Output:

cool