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:
grasshopper, fly, swim, dangle, jog

Ex Output:
jog


Ex Input:
provision, frank, hot dog, goodies, harsh

Ex Output:
harsh


Ex Input:
errands, file, keys, schedule appointments, correspondence

Ex Output:

keys