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: bird 
Words: crane, pelican, egret, hummingbird, upraise

Ex Output:
upraise


Ex Input:
Category: secretary duty 
Words: correspondence, schedule, answer calls, keys, file

Ex Output:
keys


Ex Input:
Category: chocolate food 
Words: tart, fudge, loosen, pie, molasses

Ex Output:

loosen