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.

Input: Consider Input: ounce, foot, kilometer, milimeter, heel

Output: heel

Input: Consider Input: fine, classy, mad, happy, relaxed

Output: classy

Input: Consider Input: persistent, cool, assured, unflappalbe, chill
Output: chill