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:
Humans grow with ____ sets of teeth.

Ex Output:
two


Ex Input:
Sexual reproduction involves the union of cells from ____ parents.

Ex Output:
two


Ex Input:
Bees have sentinels, gobies sentinel their nests for from ____ to nine days.

Ex Output:

six