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: poker 
Words: punch, pack, deck, check, fold

Ex Output:
punch


Ex Input:
Category: secretary duty 
Words: support, type, file, software, answer

Ex Output:
software


Ex Input:
Category: ocean 
Words: current, flow, history, signal, jetstream

Ex Output:

history