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:
Acupuncture needles are about two to ____ inches long.

Ex Output:
three


Ex Input:
Tin has ____ allotropic forms.

Ex Output:
two


Ex Input:
Legless larvae hatch out in about ____ days.

Ex Output:

four