xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x                              x
x      s                       x
x                x             x
x                x      xx     x
x                x      xx     x
xxxxxxxxxxxxxxxxxx      xx     x
                        xx      
                        xx      
xxxxxxxxxxxx            xx     x
x          x    e       xx     x
x    s     x            xx     x
x          x            xx     x
x          xxxxxxxxx    xx     x
x   xxxxxxxxxxxxxxxx    xx     x
                  xx    xx      
        xxx       xx    xx      
x       xxx       xx    xx     x
x       xxx       xx    xx     x
x                              x
xxxxxxxxxxxxxxx    s           x
x                              x
x              xxxxxxxxxxxxxxxxx
                                
                                
x            e                 x
x                              x
x     xxxxxxxxxxxxxxxxxxxxxx   x
x     x         s              x
x     x                        x
x     x  xxxxxx  xxxxxx  xxxx  x
xxxxxxx  xxxxxx  xxxxxx  xxxxxxx