w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w   +w  
+---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+
|-R-|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
|---|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
+---+----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+

                                                                                
  +w      q e e e e e e   Q e h   e e e e e e e e   Q e h    h+e e q   h+e e q  
+----+----4---------4---+-------+-----------------+--------+---------+---------+
|----|*4:---7-R-5-R---R-|-------|-5-R-7-R-5-R-4-R-|-------*|---------|---------|
|----|*4:---------------|-5-0-5-|-----------------|-7-4---*|-2-------|---------|
+----+------------------+-------+-----------------+-----5--+-----0-2-+-3---2-3-+

                                                                             
  h+e e q   q^q^q e Q     h+e e q   h+e e q   h+e e q   q^q^q e Q     q q q  
+---------+-------------+---------+---------+---------+-----------+---------+
|---------|---------9\X-|---------|---------|---------|---------R-|3:-------|
|---------|-5-4-0-2-----|-2-------|---------|---------|-5-4-0-2---|4:-3-5-0-|
+-5---4-5-+-------------+-----0-2-+-3---2-3-+-5---4-5-+-----------+---------+

                                                                              
    q e e e e e e   Q e h   e e e e e e e e   Q e h    q e e e e e e   Q e h  
+---4---------4---+-------+-----------------+-------+--4---------4---+-------+
|4:---7-R-5-R---R-|-------|-5-R-7-R-5-R-4-R-|-------|*---7-R-5-R---R-|-------|
|4:---------------|-5-0-5-|-----------------|-7-4---|*---------------|-5-0-5-|
+-----------------+-------+-----------------+-----5-+----------------+-------+

                                                               
  e e e e e e e e   Q e h    h+e e q   h+e e q   q e e+h   +w  
+-----------------+--------+---------+---------+---------+----+
|-5-R-7-R-5-R-4-R-|-------*|---------|---------|---R-----|----|
|-----------------|-7-4---*|-2-------|---------|-5-------|----|
+-----------------+-----5--+-----0-2-+-3---2-3-+-----0---+----+