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: Some countries require passports to be valid for ____ months after expiry of the visa.

A: six
****
Q: Carbon is able to bond with up to ____ other elements.

A: four
****
Q: Addiction knows ____ bounds of race, class, geography or gender.

A:
no
****