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:
Seedlings normally can take up to ____ to five years to produce their first bloom.

Ex Output:
three

Ex Input:
Ligand seeks ____ receptors into binding and mutual phosporylation.

Ex Output:
two

Ex Input:
Most eels have ____ scales and are protected by a layer of slippery mucus.

Ex Output:
no