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: fret, worried, chord, notes, headstock

Output: worried


Input: Consider Input: air, fire, hire, ban, promote

Output: air


Input: Consider Input: fly, cockroach, drive, ant, spider


Output: drive