Please choose the correct ending to complete the given sentence: Youth: [header] How to send a letter without your parents knowing [title] Know when your mailman comes. [step] 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. [substeps] If your mailman comes when you are at school, try it on a saturday.

Ending1: Teachers usually offer friday, wednesday, and saturdays, depending on the school. In the end, there is a chance that your parents will be asleep when the mailman comes for you. Ending2: ( don't send it on valentine's day; it will simply increase your chances of receiving it during the holidays). [title] Be smart, and don't let your teachers bribe you into sending it. Ending3: If you go home from school and it's late, ask what time of day the mail is, or which day its bedtime. If you can't get out, ask at the right moment. Ending4: On saturdays your mailman may come at a different time from when they do on weekdays. [title] Place the letter in at the right time.

Answer format: ending1/ending2/ending3/ending4