xxxxxxxxxxxxxxxxxxxxxExxxxxxxxxx
x     x     x    x    x        x
x   x   x xx   x   x  xx x xx  x
x   x  xx   x x x x xx Sx x    x
xxx  xx  x  x    x  x x x  x x x
x    x  x    xxx      x  x x   x
xxxx x x x xx     x xx x x  x  x
x    x  x     xxxx x     x     x
x  xx    xxx x    x  xxxx xxxx x
x x         x  x   x           x
x  xxxxxxxx    x xx x xxx xxxx x
x           x  x              xx
x    x  x     x xx x     x     x
x  xx    xxx x    x  xxxx xxxx x
x x         x  x   x           x
x  xxxxxxxx    x xx x xxx      x
x           x  x               x
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx