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: cake, fudge, rich, invent, cream

Output: invent


Input: Consider Input: answer calls, image, organize, file, correspondence

Output: image


Input: Consider Input: egret, mallet, tackle, davit, crane


Output: tackle