kkkkkkkkkkkk             
         kkkkk          kkkkk         
       kkk                  kkk       
     kkk                      kkk     
    kk                          kk    
   kk                            kk   
  kk                              kk  
 kk                                kk 
 k                                  k 
kk                                  kk
k            ..........              k
k          ..          ..            k
k         .              .           k
k        .                .          k
k        .                .          k
k        .                .          k
k         .              .           k
k          ..          ..            k
k            ..........              k
kk                                  kk
 k                                  k 
 kk                                kk 
  kk                              kk  
   kk                            kk   
    kk                          kk    
     kkk                      kkk     
       kkk                  kkk       
         kkkkk          kkkkk         
             kkkkkkkkkkkk