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: truss rod, pick, chord, worried, fret

Output: worried


Input: Consider Input: merchandise, specialty, tools, content, angry

Output: angry


Input: Consider Input: flat, duplex, condominium, horizontal, cabin


Output: horizontal