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: Most insects have one or ____ pairs of wings.
Example Output: two

Example Input: Fish kills can occur when oxygen is less than ____ ppm.
Example Output: three

Example Input: All grays have ____ saturation.
Example Output:
zero