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: fearful, content, substance, program, thing

Output: fearful


Input: Consider Input: unyielding, concerted, firm, combined, united

Output: unyielding


Input: Consider Input: down, backward, emotional, downward, flat


Output: emotional