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: truss rod, emotional supports, emotional upsets, emotionalities, fret

Ex Output:
truss rod


Ex Input:
Category: emotional status 
Words: sliding, down, emotionalities, remorseful, emotional upsets

Ex Output:
sliding


Ex Input:
Category: bird 
Words: goose, ostrich, neck, windlass, crane

Ex Output:

windlass