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:
fly, glide, flutter, eagle, train

Ex Output:
eagle


Ex Input:
hunt, fish, stingray, dolphin, bat

Ex Output:
hunt


Ex Input:
pastry, cake, fritter, blow, apple

Ex Output:

blow