In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Input: Consider Input: Lightning can travel _ miles or more horizontally from the storm, then strike the ground.

Output: six


Input: Consider Input: Friction occurs when _ objects rub together.

Output: two


Input: Consider Input: Atrial fibrillation increases a person's stroke risk by _ times.


Output: six