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.

Example Input: fly, grasshopper, walk, waggle, train
Example Output: train

Example Input: falsification, banned, mangle, chocolate cake, fudge
Example Output: chocolate cake

Example Input: fair, unjust, ok, balanced, variety
Example Output:
variety