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:
deck, sail, crew, head, fold

Ex Output:
fold


Ex Input:
fire, blaze, water, flame, recruit

Ex Output:
recruit


Ex Input:
truffles, falsehood, fudge, invent, fib

Ex Output:

truffles