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: miserable, emotional supports, down, kind, south
Example Output: south

Example Input: tko, ring, corner, hearts, deck
Example Output: hearts

Example Input: flat, lined, plane, condominium, plain
Example Output:
condominium