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: social gathering 
Words: meeting, cinema, club, group, submarine

Ex Output:
submarine


Ex Input:
Category: nutritional value 
Words: vitamin c, salt, sugar, fat, big boned

Ex Output:
big boned


Ex Input:
Category: moral characteristic 
Words: texture, unprejudiced, well, trustworthy, fair

Ex Output:

texture