Intro:DO#m,SOL#m SI ,DO#m.
|--12-11-9-11-~~~~~~~~~~--|---11--9-----9-----------|
|-------------------------|----------12-------------|
|-------------------------|11-----------------------|
|-------------------------|-------------------------|
|-------------------------|-------------------------|
|-------------------------|-------------------------|
|--12-11-9-11-~~~~~~~~~~--|---11--9-----9-----------|
|9------------------------|----------12-------------|
|-------------------------|11-----------------------|
|-------------------------|-------------------------|
|-------------------------|-------------------------|
|-------------------------|-------------------------|