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: board, caution, fight, punch, deck

Output: board


Input: Consider Input: fly, glide, flutter, eagle, train

Output: eagle


Input: Consider Input: nervous, fearful, ecstatic, content, program


Output: program