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:
Irrigation can increase land productivity by three to ____ times, especially in the north.

Ex Output:
seven


Ex Input:
Threshold is a value to avoid ____ divide.

Ex Output:
zero


Ex Input:
Most noma sufferers are under ____ years of age.

Ex Output:

six