11111111111111111        
    1tttffffffttt111111      
    1LLLLLLLLLLLLLLft11i     
    1LLLLtt11tttffLLLf1i     
    1fLLL111111111tfLLf1     
    1fLLf1      1iitLLL1     
    1fLLf1iiiiiii11fLLf1     
    iffff1iii1111tffff1i     
    iffffffffffffffftiii     
    ifffftttttt111iiiii      
    iffftiiiiiiiiiiii        
    itfftiiiiiii             
    itfft;                   
    itfft;                   
    ;tttt;                   
    ;i11i;                   
    ;;;;;;