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

Input: Consider Input: Abdominal scars consist of _ to four half-inch incisions.

Output: two


Input: Consider Input: Reds can benefit from seven to _ years' aging .

Output: nine


Input: Consider Input: Respiratory substrates are of _ kinds viz., carbohydrates, fats and proteins.


Output: three