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

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

Example Input: Most people are legally drunk after _ or two drinks.
Example Output: one

Example Input: Echinoderms have radial symmetry , many having five or multiples of _ arms.
Example Output:
five