xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x                              x
x      x       x       x       x
xt xxxxxxxxxxxxxxxxxxxxxxxxxx tx
x      x       x       x       x
x             ixi              x
xxxxxxx  xxxxxxxxxxxxx  xxxxxxxx
   s     x     x     x          
         x     x  t  x          
xxxxxxx                 xxxxxxxx
x     x        e        x      x
x 111    x  t  x  t  x         x
x 111    x     x     x      m  x
x     x  x  m  x  c  x  x     ex
xxxxxxx  xxxxxxxxxxxxx  xxxxxxxx
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PPPPPPP        t        PPPPPPPP
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x     x  x     x     x  x      x
x  i                           x
x                 t            x
x     x  x m   x     x  x      x
xxxxxxx  x     x     x  xxxxxxxx
         x     x     x          
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xxxxxxx  xxxxxxxxxxxxx  xxxxxxxx
x              x               x
x      x       x        x      x
x  xxxxxxxxxxxxxxxxxxxxxxxxxxt x
x      x  e    x        x      x
x                              x
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