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: accomodation 
Words: mansion, mountain, flat, house, duplex

Ex Output:
mountain


Ex Input:
Category: police punishment 
Words: acceptable, fine, hearing, jail time, probation

Ex Output:
acceptable


Ex Input:
Category: emotional status 
Words: annoyed, decent, acceptable, wispy, fine

Ex Output:

wispy