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: relaxed, warm, assured, level, cool

Output: warm


Input: Consider Input: format, image, fax, file, folder

Output: fax


Input: Consider Input: fly, car, walk, swim, swim


Output: swim