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:
tiger, camp, cow, dog, fish

Ex Output:
camp


Ex Input:
bordering, shut down, close, slow, open

Ex Output:

bordering