xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x     P  P    P  P    P  P     x
x  c  p  p    p  p s  p  p  m  x
x     p  p    p  p    p  p     x
x     p  p    p  p    pt p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
       11              11       
       11      t       11       
x     P  P    P  P    P  P     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
               11         e     
               11               
x     P  P    P  P    P  P     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p  t  x
x     p  p    p  p    p  p     x
       11      e       11       
 t     11          c   11       
x     P  P    P  P    P  P     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p    p  p     x
x     p  p    p  p  m p  p     x
xe    pt p    p  p    p  p     x
xxxxxxx  xxxxxx  xxxxxx  xxxxxxx