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.

Ex Input:
wine, rum, bridge, tonic, gin

Ex Output:
bridge


Ex Input:
fair, raining, equitable, impartial, unjust

Ex Output:
raining


Ex Input:
hand, foot, shin, arm, milimeter

Ex Output:

milimeter