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: answer, answer calls, space, file, schedule

Output: space


Input: Consider Input: corner, ring, crew, deck, apron

Output: crew


Input: Consider Input: unhappy, melancholy, down, opposite of up, loveful


Output: opposite of up