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.

Ex Input:
ubiquitous, general, basic, major, popular

Ex Output:
major


Ex Input:
neck, swift, egret, tackle, crane

Ex Output:
tackle


Ex Input:
fighter, cadet, popular, general, captain

Ex Output:

popular