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: Seraphs have ____ wings, and their voices can shake doorposts and thresholds.
Example Output: six

Example Input: Birds have ____ basic types of feathers.
Example Output: three

Example Input: Breast milk is all the food and water a baby needs for the first ____ months of life.
Example Output:
six