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.

Example Input: crew, ring, deck, blocking, punch
Example Output: crew

Example Input: truss rod, pick, chord, worried, fret
Example Output: worried

Example Input: fly, bus, jog, grasshopper, soar
Example Output:
grasshopper