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

Ex Input:
Aquatic adults have prominent red reathery gills, are large, and have _ toes on each foot.

Ex Output:
four


Ex Input:
Gestation is _ to nine months long, after which a single calf is born.

Ex Output:
eight


Ex Input:
Some traits require simultaneous mutations in _ or more genes.

Ex Output:

two