Caa = ...
[   1, 1/2, 0, 0, 0, 1/2;
  1/2, 1/4, 0, 0, 0, 1/4;
    0,   0, 0, 0, 0,   0;
    0,   0, 0, 0, 0,   0;
    0,   0, 0, 0, 0,   0;
  1/2, 1/4, 0, 0, 0, 1/4 ];

Cao = ...
[   0, 1/2,   1, 0, 1/2,   0;
  1/2, 1/2, 1/2, 0, 1/4, 1/4;
    1, 1/2,   0, 0,   0, 1/2;
    0,   0,   0, 0,   0,   0;
  1/2, 1/4,   0, 0,   0, 1/4;
    0, 1/4, 1/2, 0, 1/4,   0 ];

Coo = ...
[ 0,   0,   0, 0,   0, 0;
  0, 1/4, 1/2, 0, 1/4, 0;
  0, 1/2,   1, 0, 1/2, 0;
  0,   0,   0, 0,   0, 0;
  0, 1/4, 1/2, 0, 1/4, 0;
  0,   0,   0, 0,   0, 0 ];

Cbb = ...
[ 0, 0, 0,   0,   0,   0;
  0, 0, 0,   0,   0,   0;
  0, 0, 0,   0,   0,   0;
  0, 0, 0,   1, 1/2, 1/2;
  0, 0, 0, 1/2, 1/4, 1/4;
  0, 0, 0, 1/2, 1/4, 1/4 ];

Cbo = ...
[ 0,   0,   0,   0,   0,   0;
  0,   0,   0, 1/2, 1/4, 1/4;
  0,   0,   0,   1, 1/2, 1/2;
  0, 1/2,   1,   0, 1/2,   0;
  0, 1/4, 1/2, 1/2, 1/2, 1/4;
  0, 1/4, 1/2,   0, 1/4,   0 ];

Cab = ...
[   0,   0, 0,   1, 1/2, 1/2;
    0,   0, 0, 1/2, 1/4, 1/4;
    0,   0, 0,   0,   0,   0;
    1, 1/2, 0,   0,   0, 1/2;
  1/2, 1/4, 0,   0,   0, 1/4;
  1/2, 1/4, 0, 1/2, 1/4, 1/2 ];
