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: current, history, wave, jetstream, whirlpool

Output: history


Input: Consider Input: emotional upsets, pick, emotional state, fret, emotional supports

Output: pick


Input: Consider Input: davit, dump truck, hummingbird, duck, crane


Output: dump truck