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.

Input: Consider Input: sausage, matter of fact, frank, vittles, grub

Output: matter of fact


Input: Consider Input: squashed, cabin, flat, smooth, round

Output: smooth


Input: Consider Input: lettuce, club, picnic, toast, blt


Output: picnic