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

Ex Input:
Echocardiography demonstrates in clear, graphic fashion the _ cardiac chambers and four valves.

Ex Output:
four


Ex Input:
Raspberries are considered a high-fiber food at over _ grams of dietary fiber per cup.

Ex Output:
eight


Ex Input:
Reproductive maturity is reached at _ to six years in females and seven to nine years in males.

Ex Output:

four