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

Input: Consider Input: All hairs have a life expectancy of _ to six years.

Output: three


Input: Consider Input: Most orangutans are _ to five feet long, some can reach a length of six feet.

Output: four


Input: Consider Input: Burmese pythons reach sexual maturity in four to _ years.


Output: five