Internal structure ROOMS A SINGLE DOORS STRUCTURE FOR 1 LEVEL STRUCTURE FOR 2 LEVELS STRUCTURE FOR 3 LEVELS ROOMS WITH SINGLE DOOR STRUCTURE FOR 2 LEVELS STRUCTURE FOR 3 LEVELS STRUCTURE FOR 4 LEVELS ROOMS A SINGLE DOORS INTERNAL STRUCTURE FOR 1 LEVEL INTERNAL STRUCTURE FOR 2 LEVELS INTERNAL STRUCTURE FOR 3 LEVELS ROOMS WITH SINGLE DOOR INTERNAL STRUCTURE FOR 2 LEVELS INTERNAL STRUCTURE FOR 3 LEVELS INTERNAL STRUCTURE FOR 4 LEVELS
