xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x                              x
x                              x
x              s               x
x                              x
x       e                      x
x                              x
                                
                                
x     x    x   PPPPP           x
x     x    x   ppppp           x
x     x    x   ppppp           x
x              ppppp   x       x
x     x    x           x       x
x     x    x           x       x
                                
                                
x                              x
x    x       xx         xx     x
x    x   x   x        x    x   x
x    x   x   x   x    x    x   x
x    x       x   x    x    x   x
x    x   x   x    x   x e  x   x
     x   x   x     x            
     x       x      x   xx      
x                              x
x                              x
x                              x
x             s                x
x                              x
x                              x
xxxxxxx  xxxxxx  xxxxxx  xxxxxxx