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: duck, get down, fall, stoop, cow

Output: cow


Input: Consider Input: war, brandy, bridge, gin, blackjack

Output: brandy


Input: Consider Input: united, inflexible, firm, ceo, common


Output: inflexible