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.

Example Input: alright, size, dishonest, fine, fair
Example Output: size

Example Input: file, keys, document, fax, ram
Example Output: fax

Example Input: folder, text, file, ram, prepare
Example Output:
prepare