• Start from RRmDmUmRmDmRUm
• Locate in the cube a chain of three consecutive tiles hinged about parallel sided, call them A, B, C, A being the top tile of the cube and C being the bottom tile
• By slightly opening the structure change the folding between A and B from mountain to valley
• In the process tiles B and C are pushed together
• Rotate 90 degrees the newly formed flap into the final shape