• Start from RRmRmDLDRmRm
• Lower the top four tiles to the right: this is achieved by turning 90 degress to the right the two vertical tiles
• The resulting flat shape has a row of three stacks of two tiles and a lower row of two tiles
• Call second floor the set of three tiles on top of the three stacks and first floor the set of the remaining five tiles
• The two tiles of the first floor on the right of the top row can be lowered 180 degrees about their lower side
• Of these two tiles, the one on the left can be further turned down 180 degrees to the right
• We have now a flat 2x3 rectangular shape with two stacks of two tiles in opposite corners
• Open it in the final shape