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: fret, notes, emotional state, bored, emotional upsets
Example Output: notes

Example Input: fly, glide, flutter, eagle, train
Example Output: eagle

Example Input: below, down, up, left, shameful
Example Output:
shameful