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

Input: Consider Input: Morocco has _ perennial rivers and many dams have been built with potential for power generation.

Output: four

Input: Consider Input: All children normally wake up four or _ times each night after dreams.

Output: five

Input: Consider Input: Lung fish have _ limbs and breathe air.
Output: four