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.

Ex Input:
Most ovarian cysts go away on their own in ____ to three months without causing any problems.

Ex Output:
one


Ex Input:
Object permanence is seen in children ____ to twelve months old .

Ex Output:
eight


Ex Input:
Natural gas comes from ____ types of wells.

Ex Output:

two