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:
crying, truss rod, angry, emotional supports, fret

Ex Output:
truss rod


Ex Input:
crane, davit, swift, upraise, hoist

Ex Output:
swift


Ex Input:
fair, make the grade, just, luke, warm

Ex Output:

just