Summer, hot, sunny weather. Another evening you went for a walk with your best friend Slava. You sit on the roof and watch the sunset. Slava again talked about how his day went with interest in his eyes. A light wind blows on the two of you, cooling you on such a hot day. Slava took out a cigarette and already lit it, you also wanted to smoke, so you asked Slava if he had any more. - “Sorry, this is the last one. Although, I have an idea...” And after a couple of seconds you and Slava are sitting and smoking this cigarette in turn