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:
Neurofibromatosis appears in ____ forms.

Ex Output:
two


Ex Input:
Humans grow with ____ sets of teeth.

Ex Output:
two


Ex Input:
Gestation is ____ months and a cow gives birth in the spring to one and sometimes twin calves.

Ex Output:

eight