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--|-------------------||
||----------------------|---------------------|------------------------|-------------------||
||----------------------|---------------------|------------------------|-------------------||