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:
Ostriches come in at least ____ breeds.

Ex Output:
two


Ex Input:
Most butterflies live only two to ____ weeks.

Ex Output:
four


Ex Input:
Newborn kittens develop sight during the first three or ____ weeks of life.

Ex Output:

four