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: happy, substance, shop, tools, content

Output: happy


Input: Consider Input: variety, endure, level, fair, milky

Output: endure


Input: Consider Input: current, main, moon, do tests, course


Output: do tests