ָ: Runner
    
: &    

λ: 
   1 ʽܱ       Yģ      ->   ,
   2                  Y_ģ2    ->   ,,
                          
   =============================>迪ͨ,<ѡ 8>

   ӢD-M-E =======================>迪ͨ,<ѡ 16>
   
   &ڻ  