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: secretary duty 
Words: support, hardware, prepare, file, make coffee

Ex Output:
hardware


Ex Input:
Category: corporate 
Words: corporation, firm, synergy, tough, concerted

Ex Output:
tough


Ex Input:
Category: weather 
Words: raining, luke, fair, alright, sunny

Ex Output:

alright