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: emotional status 
Words: worried, angry, jack, fret, emotional upsets

Ex Output:
jack


Ex Input:
Category: mode of transportation 
Words: spider, fly, train, jog, car

Ex Output:
spider


Ex Input:
Category: emotional status 
Words: relaxed, mad, fine, exquisite, calm

Ex Output:

exquisite