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: baby animals 
Words: bambi, cub, doe, lust, fawn

Ex Output:
lust


Ex Input:
Category: activity 
Words: dally, goodbye, fritter, whittle, dumpling

Ex Output:
dumpling


Ex Input:
Category: guitar part 
Words: fret, strap lock, output cord, angry, headstock

Ex Output:

angry