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:
Most insects have two antennae, six legs, and ____ wings.

Ex Output:
four


Ex Input:
Most species have four toes, ____ of which are forward-pointing.

Ex Output:
three


Ex Input:
Young birds have a head and body moult about ____ weeks after hatching.

Ex Output:

five