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

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

Ex Output:
eight


Ex Input:
Ospreys reach sexual maturity between _ and five years of age.

Ex Output:
three


Ex Input:
Cockatiels average _ to five eggs per nest, with an egg typically laid every other day.

Ex Output:

four