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: consumer product 
Words: content, books, thing, program, jealous

Ex Output:
jealous


Ex Input:
Category: activity 
Words: fritter, waste, pie, waste away, lollygag

Ex Output:
pie


Ex Input:
Category: animal 
Words: dangle, bats, bus, ant, fly

Ex Output:

bus