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: deck, board, cards, knockout, draw
Example Output: knockout

Example Input: deck, board, corner, knockout, fight
Example Output: board

Example Input: flyaway, exquisite, fine, wispy, prison
Example Output:
exquisite