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: Some nurseries only take children aged ____ years and over.
Example Output: two

Example Input: Cognitive changes are probably equivalent to about a three to ____ month delay in progression.
Example Output: six

Example Input: Triclinic system has ____ axes all of different lengths and all inclined to each other.
Example Output:
three