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:
variety, medium, endure, size, fair

Ex Output:
endure


Ex Input:
run, bats, fly, flutter, spider

Ex Output:
flutter


Ex Input:
exquisite, probation, firstrate, fine, money

Ex Output:

exquisite