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:
fighter, boring, popular, standard, general

Ex Output:
fighter


Ex Input:
jack, string, crying, neck, fret

Ex Output:
crying


Ex Input:
ram, file, text, prepare, program

Ex Output:

prepare