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:
Sponges are subdivided into ____ classes.

Ex Output:
three


Ex Input:
Edges Usually refers to the ____ outside edges of the pages of a book.

Ex Output:
three


Ex Input:
Some protozoans have ____ means of movement.

Ex Output:

no