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

Example Input: Climatic regions Contrasts between the interior and the coasts produce _ main climatic regions.
Example Output: six

Example Input: Tomatoes require about six to _ weeks from seeding until they reach transplant size.
Example Output: eight

Example Input: Lobsters use their _ pairs of antennas as sensors.
Example Output:
three