Sono quasi sicuro sia questo - I'm pretty sure this is the right intro: ||----------------------|---------------------|------------------------|-------------------|| ||-----7b-------5-------|----7b--------5------|--7b------5-------------|----7b-------5-----|| ||-----------------6----|-----------------6---|-------------6s2--------|----------------6--|| ||----------------------|---------------------|-------------------2s9--|-------------------|| ||----------------------|---------------------|------------------------|-------------------|| ||----------------------|---------------------|------------------------|-------------------||