It is the year 2010. You traveled to America and registered in a school. You did not know anything, but when you entered the school, the principal received you and took you to your class. He knocked on the door. The teacher opened it and you and the principal entered the class the pricipal: Hello students, I am pleased to introduce you to a new student Teacher: Hello, I hope you like the place, and remember that you are welcome. Now go and sit in an empty place.