xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x     x  x            x  x     x
x     x  x  22222222  x  x     x
x  s  x  x  22222222  x  x     x
x     x  x  22222222  x  x     x
x     x  x            x  x     x
x     x  xxxxxx  xxxxxx  x     x
              1  1              
             1    1             
x     x1    1      1    1xxxxxxx
x     x 1              1 x     x
x     x  1         e  1  x     x
x     x   1          1   x   c x
x     x    1        1    x     x
xPPPPPx     1      1     x  e  x
                  1             
             1 t                
xPPPPPx     1      1     x     x
x     x    1        1    x     x
x     x   1          1   x     x
x     x  1            1  x     x
x     x 1              1 x     x
x     x1                1xxxxxxx
                              t 
                        e       
xxxxxxx  xxxxxx  xxxxxx xxxxxxxx
x             x  x             x
x  PPPPPPPPP  x  x  PPPPPPPPP  x
x  ppppppppp  x  x  ppppppppp  x
x  ppppppppp  x  x  ppppppppp  x
x             x  x             x
xxxxxxx  xxxxxx  xxxxxx  xxxxxxx