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: shady activities 
Words: falsification, wrongful, rich, fudge, unlicensed

Ex Output:
rich


Ex Input:
Category: aesthetic characteristic 
Words: 70, pale, fair, light, milky

Ex Output:
70


Ex Input:
Category: animal 
Words: spider, fly, bats, cockroach, bike

Ex Output:

bike