Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Example Input: blackjack, gin, poker, wine, slapjack
Example Output: wine

Example Input: egret, crane, goose, dump truck, duck
Example Output: dump truck

Example Input: signal, current, belated, prompt, timely
Example Output:
signal