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: air, fire, hire, ban, promote

Output: air


Input: Consider Input: upraise, crane, excavator, digger, hoist

Output: hoist


Input: Consider Input: fret, strap lock, chord, truss rod, emotionalities


Output: emotionalities