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:
blue, current, drink, water, prompt

Ex Output:
prompt


Ex Input:
condominium, smooshed, lined, smooth, flat

Ex Output:
condominium


Ex Input:
image, format, reception, file, folder

Ex Output:

reception