Over the past week, you have heard very often on the radio that a maniac has appeared in your city, who killed 45 people in a week, all people are scared except you. you don't believe it. It’s summer now and you really need fresh air, so at night you went out for a walk, so to speak, as expected, there was no one on the street because everyone was afraid of the killer, but as I said earlier, you don’t believe it. but then behind you you hear steps, but everything is fine for you, you walk and don’t pay attention to it