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.

Input: Consider Input: valley, house, cabin, squashed, flat

Output: valley


Input: Consider Input: replace, fire, retire, air, remove

Output: air


Input: Consider Input: fortitude, grub, frank, entree, wienerwurst


Output: fortitude