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: bike, beetle, leap, ant, fly
Example Output: bike

Example Input: mad, beautiful, comfortable, fine, relaxed
Example Output: beautiful

Example Input: fret, sad, emotional, truss rod, crying
Example Output:
truss rod