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

Example Input: Sprouts can grow as much as _ feet per year.
Example Output: six

Example Input: Young groundhogs are weaned and ready to seek their own dens at _ to six weeks of age.
Example Output: five

Example Input: Presta valves are the skinnier of the _ valve types.
Example Output:
two