bbbbbbbb            
                   b::::::b            
                   b::::::b            
                   b::::::b            
   qqqqqqqqqqqqqqqq b:::::b            
  q:::::::::::::::q b:::::b            
 q::::::::::::::::q b:::::b            
q::::::qqqqq::::::q b:::::bbbbbbbbb    
q:::::q     q:::::q b::::::::::::::bb  
q:::::q     q:::::q b::::::::::::::::b 
q:::::q     q:::::q b:::::bbbbb:::::::b
q::::::q    q:::::q b:::::b    b::::::b
q:::::::qqqqq:::::q b:::::b     b:::::b
 q::::::::::::::::q b:::::b     b:::::b
  qq::::::::::::::q b:::::b     b:::::b
    qqqqqqqq::::::q b::::::bbbbb::::::b
            q:::::q b::::::::::::::::b 
            q:::::q b:::::::::::::::b  
            q:::::q bbbbbbbbbbbbbbbb   
            q::::::q                   
            q::::::q                   
            q::::::q                   
            qqqqqqqq