Sonya decided to try out a new device. Timer. The girl climbed into the vacuum bed. And turned on the timer. At every interval of time, the timer turned on the vacuum cleaner. Everything was fine, even wonderful. And now Sonya enjoyed the process and wanted to get out, a little more and the vacuum bed would have opened, but then the vacuum cleaner worked. It did not let the girl go. She had to let the air in and try to get out again...