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:
standard, general, regular, universal, commander

Ex Output:
commander


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

Ex Output:
fax


Ex Input:
queen, chips, knockout, call, deck

Ex Output:

knockout


