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: shady activities 
Words: falsification, fib, invent, fudge, cupcake

Output: cupcake


Input: Consider Input: Category: guitar part 
Words: fret, angry, truss rod, inlays, output cord


Output: angry