Write the next sentence in the following story.

How to send a letter without your parents knowing
Know when your mailman comes.
Find out at what time your mailman comes; they usually come at a certain time range, so watch for a few days and keep track of the time.
If your mailman comes when you are at school, try it on a saturday.
On saturdays your mailman may come at a different time from when they do on weekdays. Place the letter in at the right time.