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:
frank, bold, brash, precise, pork

Ex Output:
pork


Ex Input:
sergeant, lieutenant, fighter, general, ordinary

Ex Output:
ordinary


Ex Input:
truss rod, emotional upsets, fret, notes, amp

Ex Output:

emotional upsets