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:
blow, waste away, fritter, dally, croquet

Ex Output:
croquet

Ex Input:
variety, medium, endure, size, fair

Ex Output:
endure

Ex Input:
hiking, cat, sea turtle, shark, fish

Ex Output:
hiking