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:
sergeant, lieutenant, fighter, general, ordinary

Ex Output:
ordinary


Ex Input:
concrete pourer, winch, excavator, hoist, crane

Ex Output:
hoist


Ex Input:
disappointed, jewelry, service, content, thing

Ex Output:

disappointed