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: current, wave, whirlpool, sea, data sets

Output: data sets


Input: Consider Input: pack, hearts, deck, queen, rudder

Output: rudder


Input: Consider Input: pester, social, fawn, kitten, cute


Output: kitten