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: Gibberellins are diterpenoids derived from four isoprenoid units forming a system of ____ rings.

A: four
****
Q: Giant pandas move on all ____ legs.

A: four
****
Q: Most normal children have ____ to six colds a year.

A:
four
****