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:
shareholders, alignment, firm, sustainability, solid

Ex Output:
solid


Ex Input:
fat, calories, vitamin c, absorption, carbs

Ex Output:
absorption


Ex Input:
make the grade, raining, fair, luke, honorable

Ex Output:

honorable