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:
truss rod, pick, chord, worried, fret

Ex Output:
worried


Ex Input:
cream, wrongful, fix, fudge, smear

Ex Output:
cream


Ex Input:
prompt, current, detestings, whirlpool, late

Ex Output:

whirlpool