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: deck, stern, apron, blocking, caution

Output: stern

Input: Consider Input: bats, pounce, cockroach, bike, fly

Output: bike

Input: Consider Input: fret, worried, chord, amp, jack
Output: worried