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: tackle, davit, swift, crane, steam roller

Output: steam roller


Input: Consider Input: folder, hardware, file, firewall, support

Output: support


Input: Consider Input: walk, flap, fish, bird, fly


Output: flap