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

Example Input: Coral reefs make up only _ per cent of the area of the Great Barrier Reef.
Example Output: five

Example Input: Pelagic division is divided into neritic and _ levels of pelagic provinces.
Example Output: three

Example Input: Porcupines have four toes on their front paws and _ on their rear paws.
Example Output:
five