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

Ex Input:
Stroke is our nation's number _ killer, and a leading cause of disability for older adults.

Ex Output:
three


Ex Input:
Men are _ times as likely as women to complete suicide.

Ex Output:
three


Ex Input:
Bluebirds generally live in _ overlapping regions of North America.

Ex Output:

three