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:
pick, fret, string, fingerpick, sad

Ex Output:
sad


Ex Input:
standard, general, regular, universal, commander

Ex Output:
commander


Ex Input:
pasty, sugars, heavy, fat, angular momentum

Ex Output:

sugars