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

Example Input: Roundworms are fairly large worms that can grow to be _ or five inches long.
Example Output: four

Example Input: Monarch caterpillars have _ pairs of tentacles.
Example Output: two

Example Input: People often have to wait between _ and five years for an organ especially for a liver.
Example Output:
three