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: signal, sea, current, drink, belated
Example Output: belated

Example Input: fair, unprejudiced, impartial, honorable, variety
Example Output: variety

Example Input: amalgamated, solid, stiff, hard, firm
Example Output:
amalgamated