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:
Ozone leaves ____ by-products except pure oxygen.

Ex Output:
no


Ex Input:
Hedgehogs give birth to one to ____ babies which are born with the spines just below the skin.

Ex Output:
seven


Ex Input:
Mangroves have ____ basic organs lika any other ordinary plant, the stem, the leaf and the root.

Ex Output:

three