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:
fire, blaze, water, flame, recruit

Ex Output:
recruit


Ex Input:
milimeter, yard, foot, leg, meter

Ex Output:

leg