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:
Jurassic rocks have _ outcrops in the area but they are identified by bore holes.

Ex Output:
no


Ex Input:
Moderation is defined by at least one beer company as drinking up to _ drinks a day.

Ex Output:

four