xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x            x    x            x
x            x    x            x
x     s      x    x            x
x            x    x            x
x            x                 x
x            x                 x
             x                  
             x    x             
xxxxxxxxxxx  x    x            x
x            x    x            x
x m          x    x        e   x
x c          x    xPPPPPPP    cx
x            x    xppppppp     x
xxxxxxx  xxxxx    xxxxx    xxxxx
                s               
                                
x1 1111111111x    x     c      x
x1        111x    x            x
x11111111 111x    x            x
x11111    111x    x            x
x11111 111111x    x            x
x11111 111111x    x            x
             x    x     s       
             x    x             
x            x    x            x
x            x    x            x
x            x    x            x
x      m     x    x        e   x
x            x    x            x
x            x    x            x
xxxxxxx  xxxxxx  xxxxxx  xxxxxxx