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

Ex Input:
Some dentists prefer using the oral rinse for _ to five days at a time.

Ex Output:
three


Ex Input:
Grasshoppers develop through _ to six instars.

Ex Output:
five


Ex Input:
Racers refer to _ types of oval tracks.

Ex Output:

three