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:
belated, moon, current, data sets, do tests

Ex Output:
moon

Ex Input:
signal, sea, current, drink, belated

Ex Output:
belated

Ex Input:
fly, glide, ant, dive, pounce

Ex Output:
glide