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

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

Output: eight

Input: Consider Input: Most people see the world through _ types of visual-receptor cells.

Output: four

Input: Consider Input: Television is so pervasive that many homes have _ or more sets.
Output: four