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

Ex Input:
Figure skating is like flying, but it's also like climbing hundreds of stairs in _ minutes.

Ex Output:
four


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

Ex Output:
three


Ex Input:
Bees normally live for about thirty days, but infected bees survive for only _ to five days.

Ex Output:

three