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: police punishment 
Words: prison, fine, calm, money, suspension

Ex Output:
calm


Ex Input:
Category: boats 
Words: deck, draw, gunwale, head, rudder

Ex Output:

draw