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

Input: Consider Input: Weasels reaching _ to six years are regarded as fully mature.

Output: five


Input: Consider Input: Phosphates are made of _ phosphorus atom surrounded by four oxygen atoms.

Output: one


Input: Consider Input: Brain death occurs in just four to _ minutes unless the heart rhythm is restored.


Output: six