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:
ostrich, hoist, egret, crane, parrot

Ex Output:
hoist

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

Ex Output:
moon

Ex Input:
file, download, ram, reception, hardware

Ex Output:
reception