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

Input: Consider Input: Osteoporosis is _ to four times more common in woman than men.

Output: three


Input: Consider Input: All imaginary numbers are complex numbers with _ for the real part.

Output: zero


Input: Consider Input: Catheter ablation is an invasive procedure that takes three to _ hours.


Output: five