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:
goodies, sausage, frank, bold, entree

Ex Output:
bold


Ex Input:
gated, right there, not open, barred, close

Ex Output:

right there