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:
data sets, sea, prompt, timely, current

Ex Output:
sea

Ex Input:
spatula, panel, plastic, glass, translucent fabric

Ex Output:
spatula

Ex Input:
calcium, big, fat, absorption, heavy

Ex Output:
absorption