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: neck, swift, egret, tackle, crane

Output: tackle


Input: Consider Input: apartment, round, valley, flat, even

Output: valley


Input: Consider Input: close, nearest, touching, on top of, barred


Output: barred