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:
duck, bend, ostrich, jog, stoop

Ex Output:
ostrich


Ex Input:
hiking, stingray, shark, fish, tiger

Ex Output:
hiking


Ex Input:
team, doorstep, meeting, club, community

Ex Output:

doorstep