Tak :: Children plank 1 plank 1-1 plank 1-1-1 (hidden) plank 1-1-1-1 plank 1-1-1-1-1 (hidden) plank 1-1-1-1-1-1 plank 1-1-2 plank 1-1-2-1 plank 1-1-2-2 plank 1-1-3 plank 2 plank 3 plank 3-1 plank 4 (hidden) plank X