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: backward, south, down, forward, shameful

Output: shameful


Input: Consider Input: brittleness, area, absorption, fat, calories


Output: calories