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: mallet, winch, parrot, winch, crane
Example Output: winch

Example Input: duck, get down, fall, stoop, cow
Example Output: cow

Example Input: lifeline, canvas, corner, ring, deck
Example Output:
lifeline