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: swallow, heron, crane, flamingo, tackle

Output: tackle


Input: Consider Input: fire, cool, water, ban, ice

Output: ban


Input: Consider Input: mangle, cookies, fix, fudge, invent


Output: cookies