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: replace, fire, retire, air, remove

Output: air


Input: Consider Input: grasshopper, fly, swim, dangle, jog

Output: jog


Input: Consider Input: hiking, trap, hamster, fish, climbing


Output: hamster