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:
Green energy comes in ____ basic forms.

Ex Output:
two


Ex Input:
Milk is a good source of all ____ nutrients.

Ex Output:
three


Ex Input:
Redness persists for an unpredictable length of time, varying from ____ weeks to four months.

Ex Output:

three