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: computers 
Words: ram, file, prepare, keys, format

Ex Output:
prepare


Ex Input:
Category: aesthetic characteristic 
Words: prison, fine, there, handsome, high quality

Ex Output:
prison


Ex Input:
Category: computers 
Words: keys, answer, file, folder, motherboard

Ex Output:

answer