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: townhome, mountain, studio, flat, apartment

Output: mountain


Input: Consider Input: mild, cold, level, stormy, fair

Output: level


Input: Consider Input: jewelry, clothing, thing, content, happy


Output: happy