|----------------------------------------------------|
|----------------------------------------------------|
|----------------------------------------------------|
|----------------------------------------------------|
|--7-7-7-6-7-7---------------4-4-4-3-4-4--7----------|
|---------------7-7-7-6-7-7-----------------4-5-6-7-7|
|----------------------------------------------------|
|----------------------------------------------------|
|----------------------------------------------------|
|----------------------------------------------------|
|--7-7-7-6-7-7---------------4-4-4-3-4-4--7----------|
|---------------7-7-7-6-7-7-----------------4-5-6-7-7|
|----------------------------------------------------|
|----------------------------------------------------|
|----------------------------------------------------|
|----------------------------------------------------|
|--------7-------------------------------------------|
|--5--5----4-5-6-7-7---------------------------------|