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:
Women normally have ____ ovaries.

Ex Output:
two


Ex Input:
Tin has ____ allotropic forms.

Ex Output:
two


Ex Input:
Sulphur comes in several varieties, such as rings of six, seven, eight and ____ atoms.

Ex Output:

ten