bbbbbbbbbbbbbbb 
 b       b     b 
 b bbbbbbb b b b 
 b b       b b b 
 b b bbbbbbb bbb 
 b b b     b   b 
 b b bbb bbbbb b 
 b b   b b   b b 
 b bbb b b b b b 
 b       b b   b 
 b bbbbbbb bbb b 
 b b   bsb b   b 
 b b bbb b b bbb 
 b b   b b b b b 
 b bbb b b b b b 
 b   b b b b   b 
 bbb b b b bbb b 
 b b b b b   b b 
 b b b b bbb bbb 
 b b b b   b   b 
 b b b bbb b b b 
 b   b   b b b b 
 b bbbbb b bbb b 
 b b   b b   b b 
 b b b b bbb b b 
 b   b b   b   b 
 bbbbb bbb bbbbb 
 b     b       b 
 b bbbbb bbbbb b 
 b       b     E 
 bbbbbbbbbbbbbbb