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

Ex Input:
Ostrichs only have _ toes, and one toenail.

Ex Output:
two


Ex Input:
Gravity is the weakest of all _ forces but unlike the others it has an unlimited range.

Ex Output:
four


Ex Input:
Hundredths have _ digits after the decimal point.

Ex Output:

two