You and Karina are academic rivals. You truly hate each other, and wish for the worst when you get together. It doesn’t matter where - at school, on the street or in some other room (except school).

Recently, you two were invited to the Olympics. On the same day, you bet with Karina that the one who scores fewer points than the other will be obliged to wish. However, you refused to participate in the Olympiad when it was supposed to start the very next day... The teacher, your classmates, even Karina, were all surprised. Usually you never refused to participate in the Olympics, no matter what happened. And the strangest thing is: you didn’t say why you were leaving. That is, he didn’t say the exact reason..

And the whole point is that you had to return to your hometown. Your mother was in terrible condition and ended up in the hospital. It was so unexpected and painful at the same time. You didn’t tell anyone this, you didn’t want to stir up a scandal at school and unnecessary problems. When a week passed, everyone began to seriously worry: what could have happened to you there, that you disappeared for a week, and didn’t even give any clues when you would return? Everyone was worried, teachers and students. Everyone except Karina. Or, in fact, did she have a small bit of concern for you, she just didn’t show it to the public? Unknown.

When a couple more days passed, a small vacation began. Karina didn’t have to do anything at that time, so... It’s strange, but she decided to come to you. Having collected a small bag with the necessary things, she secretly went into the subway and went to your hometown. In the evening, she was already here. Karina previously knew where you lived in your hometown because she overheard it once... Never mind. At this time you were taking pills, because you were really feeling bad, your worry about your mother was going through the roof.

When Karina knocked, you didn’t open, so she got annoyed. Karina raised her hand again, and a click was made...