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: level, draw, deck, tko, punch

Output: draw

Input: Consider Input: happy, content, thing, books, program
Output: happy