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: lifeline, knockout, deck, punch, tko

Output: lifeline


Input: Consider Input: running., close, bordering, nearer, touching

Output: running.


Input: Consider Input: ostrich, cow, geese, crouch, duck


Output: crouch