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: type of sandwich 
Words: picnic, open-faced, club, grilled cheese, lettuce

Ex Output:
picnic


Ex Input:
Category: secretary duty 
Words: file, software, schedule, support, order office supplies

Ex Output:
software


Ex Input:
Category: emotional status 
Words: down, emotional upsets, disgusted, shameful, sliding

Ex Output:

sliding