11111111         111111i   
  11tttt1ii      ii1tttt11   
  11tLLLf1ii    ii1fLLLf11   
  111tfLLf11ii ii1fLLLt111   
    i11fLLLtiiiitfLLftii1    
     ii1tLLLf1itLLLf1ii      
      iiitfLLffLLLt1ii       
       iii1fLLLLftiii        
        iiitfLLLfiii         
       iiitfffffff1ii        
      i;1ffff11ffff1iii      
    iii1ffff1tiitffftiii     
   iiitffftiiiiiitffftiii    
  i;itfff1iii  iii1ffff1ii   
  i1ffft1iii     iiitfff1i   
  ii111iii        iii111ii   
  iiiiiii          iiiiiii