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: fritter, whittle, divide, misuse, dumpling

Output: dumpling


Input: Consider Input: descending, up, south, sad, down


Output: sad