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

Input: Consider Input: Smokers tend to become disabled and retire early _ times more than non-smokers.

Output: six


Input: Consider Input: Air resistance is _ at zero velocity.

Output: zero


Input: Consider Input: Animals eating raw food often have _ enzymes at all in saliva, unlike humans.


Output: no