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: parrot, goose, crane, swallow, excavator

Output: excavator


Input: Consider Input: fret, worried, chord, notes, headstock

Output: worried


Input: Consider Input: matter of fact, frank, stern, sausage, loyalty


Output: sausage