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:
ounce, foot, kilometer, milimeter, heel

Ex Output:
heel


Ex Input:
gated, right there, not open, barred, close

Ex Output:
right there


Ex Input:
carbs, heavy, calories, capacitance, fat

Ex Output:

capacitance