Gtr I
      ~~                     ~~        ~~
|-12---------------------12---------------|2
|----12---------------------12------------|v
|--------14-16------------------14-16-----|e
|--------------14-12-14---------------14--|z
|-----------------------------------------|e
|-----------------------------------------|s

      ~~                                    ~
|----------------------------------------------|
|-13-------------------13----------------------|
|----12--10h12------------12-10h12-------10-9--|
|--------------10-8-10-------------10-11-------|
|----------------------------------------------|
|----------------------------------------------|

  ~~~~~~~~~   ~    ~   ~                                   ~~
|---------------------------------------------------10-12--------------| (repete, etc.)
|-----10-8---------------------------------10h12h13-------12-----------|
|-9-7-----------12-7-9-7-------------10h12--------------------14-16----|
|----------10-9----------10-10h12h14-----------------------------------|
|----------------------------------------------------------------------|
|----------------------------------------------------------------------|