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: R is an average of the color rendering ability of ____ or more specific colors.
Example Output: eight

Example Input: Fossil fuels come in ____ major forms coal, oil and natural gas.
Example Output: three

Example Input: Insects have three pairs and arachnids have ____ pairs of limbs.
Example Output:
four