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

Input: Consider Input: Echocardiography demonstrates in clear, graphic fashion the _ cardiac chambers and four valves.

Output: four


Input: Consider Input: Some dentists prefer using the oral rinse for _ to five days at a time.

Output: three


Input: Consider Input: Plants are four feet apart with _ feet between rows.


Output: ten