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:
Cellulose contains nothing that is considered hazardous, and carries ____ hazardous warning messages.

Ex Output:
no


Ex Input:
Rape occurs every ____ minutes in the United States.

Ex Output:
six


Ex Input:
Natural cerium is stable and contains ____ isotopes.

Ex Output:

four