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 newborns nurse every one to ____ hours, even at night.

Ex Output:
three


Ex Input:
Photons have ____ mass and no electrical charge.

Ex Output:
no


Ex Input:
Respect is the essential concept between any ____ life-forms.

Ex Output:

two