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

Ex Input:
Bull sharks are a 'requiem' species, reaching up to _ feet in length.

Ex Output:
ten


Ex Input:
Black widows mature in two to _ months.

Ex Output:
four


Ex Input:
Sirenians are solitary, travel in pairs, or associate in groups of _ to about six individuals.

Ex Output:

three