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:
Ozone is formed of ____ atoms of oxygen.

Ex Output:
three


Ex Input:
Pertussis is highly contagious with symptoms that can linger ____ to ten weeks.

Ex Output:
six


Ex Input:
Compound objects have ____ representations themselves.

Ex Output:

no