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:
fawn, social, cub, kid, colt

Ex Output:
social


Ex Input:
streamline, sustainability, private, firm, stiff

Ex Output:
stiff


Ex Input:
organize, type, folder, make coffee, file

Ex Output:

folder