You walk into the building to see up-down ladder. The ladder next to the bathroom, walk down stairs to the basement to find the English rooms, classrooms, 9003.
You walk into the building to see the stairs - up and down. Stairs next to the toilet Walk down the stairs to the basement to find a 9003 English classroom.
You walk into the building to see the stairs up and down stairs next to the toilet. Walk down the stairs to the basement to see English class room, 9003