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: Marsupials have ____ vaginas and a double uterus.
Example Output: two

Example Input: Primates have ____ digits on their forelimbs.
Example Output: five

Example Input: Insecticides have ____ impacts.
Example Output:
two