• Start from RRmUmDvLDmUvRv
• Rotate it about the vertical axis such that the top two vertical tiles if viewed from East are of A shape (the two front lower tiles are of V shape)
• Lower the two top tiles by rotating them 90 degrees towards West
• Change the hinging side of the two new stacked tiles, simultaneously push North the common (vertical) side of the two front lower tiles
• Turn East the newly formed flap into the final shape.