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.

Example Input: vitamin c, carbs, fiber, fat, thin
Example Output: thin

Example Input: truss rod, emotional supports, emotional upsets, emotionalities, fret
Example Output: truss rod

Example Input: fish, leap, fly, jog, jump
Example Output:
jog