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:
Early childhood refers to the time period between birth and ____ years of age.

Ex Output:
eight


Ex Input:
Tetrads come in ____ shapes.

Ex Output:
seven


Ex Input:
Lampreys are primitive, jawless fishes, lack paired fins, and have ____ porelike gill openings.

Ex Output:

seven