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: sugars, fat, protein, skinny, iron

Output: skinny


Input: Consider Input: bus, fly, swim, spider, flap

Output: spider


Input: Consider Input: swim, bike, fly, flutter, drive


Output: swim