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: sustainability, firm, amalgamated, combined, rigged

Output: rigged


Input: Consider Input: cupcake, fudge, tart, smear, cream

Output: smear


Input: Consider Input: tangle, medium, raining, brisk, fair


Output: medium