Now, you can imagine that running through to the room to find people who are washing, you find a door which you will need to choose one door that opens, you can select what color doors.
Now imagine that you're running through the room in order to find someone. Then you have found the doors of the 7 rooms in which you have chosen to open the door. You can choose what color door And want to find someone standing behind the door.
.Now you to imagine running through the various rooms to looking for someone. And then you can find the room door 7 which you will have to choose to open a door, you will choose the color. .