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: poker 
Words: fold, suits, deck, sail, hearts

Ex Output:
sail


Ex Input:
Category: type of sandwich 
Words: open-faced, team, roll, doorstep, club

Ex Output:
team


Ex Input:
Category: animal 
Words: fish, bat, sea turtle, trap, goat

Ex Output:

trap