Jagatud heli

There were two friends living in a small town: Ali and Usman. They both studied in the same school. Ali was very hardworking. He did his homework on time every day and listened attentively to the teacher. But Usman was the complete opposite. He only played and never completed his homework. One day, the teacher announced, "Exams are next week." Ali started preparing. He studied a little every day. Usman said, "There's still plenty of time... I'll finish later." Days passed. The exam was al