|-----------------------------------------6-7-8-9-------------------------------------------------------|
|---------------------------------5-6-7-8---------7-8-9-10----------------------------------------------|
|-------------------------4-5-6-7--------------------------8-9-10-11------------------------------------|
|-----------------3-4-5-6--------------------------------------------9-10-11-12-------------------------|
|---------2-3-4-5---------------------------------------------------------------10-11-12-13-------------|
|-1-2-3-4-----------------------------------------------------------------------------------11-12-13-14-|
|-----------------------------------------1-2-3-4---|
|---------------------------------1-2-3-4-----------|
|-------------------------1-2-3-4-------------------|
|-----------------1-2-3-4---------------------------|
|---------1-2-3-4-----------------------------------|
|-1-2-3-4-------------------------------------------|
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