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

Input: Consider Input: Blood pressure is really _ measurements, systolic and diastolic.

Output: two


Input: Consider Input: Manatees swim two to _ miles per hour.

Output: six


Input: Consider Input: Dreams are the wanderings of the spirit though all _ heavens and all nine earths.


Output: nine