Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Q: Blisters normally burst and crust over within three to ____ days.

A: five
****
Q: Dholes are highly social animals and live in packs of about ____ dogs.

A: ten
****
Q: Burmese pythons reach sexual maturity in four to ____ years.

A:
five
****