Last night you walked well. It turned out that the landlady went to sleep in the room. In the morning you woke up in the same place, but the problem is that the front door was locked. This morning, you need to come to school to take the exam. You left two hours to unlock the door and get to the audience. Yelling does not make sense, you will not hear. After all, no one in the house. You will have to count only on themselves.