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: firm, shareholders, common, alignment, taut

Output: taut


Input: Consider Input: fax, file, format, image, document

Output: fax


Input: Consider Input: lead, metal, glass, plate, wood


Output: plate