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: nervous, frustrated, fret, jack, concerned

Output: jack


Input: Consider Input: tackle, davit, swift, crane, steam roller

Output: steam roller


Input: Consider Input: eagle, bird, wave, fish, fly


Output: wave