xxxxxxx  xxxxxx  xxxxxx  xxxxxxx
x   xxx  xx sxx  x    x  xxx   x
x  sxxx   x  x   x    x   xxs  x
x   xxx         x     x   xx   x
x              xxxx  xx        x
x xxxxxxxx    xxxxx            x
xxxxxxxxxxx  xxxxxx       xxx  x
                                
                                
xxxxxxxxxxxx        xxxxxxxxxxxx
x         x          x         x
x               1              x
x       x              x       x
x      x     1     1    x      x
xxxxxxx                  xxxxxxx
                                
                                
xxxxxxx      1     1     xxxxxxx
x      x                x      x
x                              x
x        x    1   1   x        x
x         x          x         x
xxxxxxxxxxxx        xxxxxxxxxxxx
                                
                                
xxxxxxxxxx  xxxxxxx  xxx  xxxxxx
x        x   xxxxx    xx  xxxxxx
x  s    x     xxx      x  xxxxxx
x           x      x   x       x
xxxxxxx   x  x    x  x    xx   x
xxxxxxx  x    x  x    x  xxx   x
xxxxxxx  xxxxxx  xxxxxx  xxxxxxx