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: centimeter, yard, foot, milimeter, head

Output: head

Input: Consider Input: even, light, dishonest, variety, fair

Output: dishonest

Input: Consider Input: digger, hoist, davit, crane, neck
Output: neck