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.

Example Input: Acoustic instruments consist of ____ main parts neck, top, back and sides.
Example Output: four

Example Input: Fitness has ____ components, aerobic and muscular.
Example Output: two

Example Input: Some professionals advise waiting until a child is ____ months or older.
Example Output:
six