Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Input: Consider Input: Category: measurement unit 
Words: centimeter, leg, mile, meter, foot

Output: leg


Input: Consider Input: Category: ocean 
Words: flow, current, course, moon, dastards

Output: dastards


Input: Consider Input: Category: weather 
Words: mild, tone, tangle, fair, endure


Output: tone