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.

Category: fried food 
Words: apple, whittle, dumpling, fritter, pie
whittle

Category: type of sandwich 
Words: submarine, group, club, roll, grilled cheese
group

Category: police punishment 
Words: ticket, fine, pretty, custody, jail time

pretty