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: military rank 
Words: general, fighter, normal, major, lieutenant

Ex Output:
normal


Ex Input:
Category: boats 
Words: hull, deck, rudder, check, lifeline

Ex Output:
check


Ex Input:
Category: widespread 
Words: standard, sergeant, boring, plain, general

Ex Output:

sergeant