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:
jack, string, crying, neck, fret

Ex Output:
crying


Ex Input:
duplex, studio, cabin, horizontal, flat

Ex Output:
horizontal


Ex Input:
reception, type, motherboard, errands, file

Ex Output:

motherboard