In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Example Input: Cardinals are approximately _ and three fourths inches in length.
Example Output: eight

Example Input: Diarrhea is an illness that kills _ and one-half million children per year.
Example Output: three

Example Input: Cytochrome oxidase consists of _ cytochromes and two copper atoms.
Example Output:
two