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: food 
Words: frank, entree, goodies, concise, wiener

Ex Output:
concise


Ex Input:
Category: secretary duty 
Words: fax, program, file, make coffee, answer

Ex Output:
program


Ex Input:
Category: boxing terminology 
Words: deck, ring, rudder, canvas, level

Ex Output:

rudder