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.

Ex Input:
prison, fine, there, handsome, high quality

Ex Output:
prison


Ex Input:
dally, waste away, fried, whittle, fritter

Ex Output:
fried


Ex Input:
bike, walk, fly, flutter, bus

Ex Output:

walk