|------------------------|
|------------------------|
|------1-1-1-----4-3-2---|
|-1-1-1-----4-4-4------1-|
(3x)
|-------------------------|--------------------------|
|-------------------------|--------------------------|
|-------1-3-1-------4-6-4-|-------1-3-1------4-4-4-4-|
|-1-3-1-------4-6-4-------|-1-3-1-------4-6-4--------|