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:
spatula, panel, plastic, glass, translucent fabric

Ex Output:
spatula


Ex Input:
group, dance hall, club, outing, dagwood

Ex Output:
dagwood


Ex Input:
ethical, relaxed, relaxing, unflappalbe, cool

Ex Output:

relaxing