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:
ecstatic, specialty, substance, content, merchandise

Ex Output:
ecstatic


Ex Input:
fine, wispy, alright, mad, well

Ex Output:
wispy


Ex Input:
handsome, level, fine, attractive, probation

Ex Output:

probation