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: tiger, camp, cow, dog, fish

Output: camp


Input: Consider Input: sustainability, firm, amalgamated, combined, rigged

Output: rigged


Input: Consider Input: standard, general, popular, ubiquitous, captain


Output: captain