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: Manatees swim ____ to six miles per hour.
Example Output: two

Example Input: Some adjectives have ____ forms, others have four.
Example Output: two

Example Input: Many satellites orbit each of the ____ giant planets.
Example Output:
four