$x_{0,1}$

$x_{0,2}$

$x_{0,3}$

$x_{1,0}$

$x_{1,2}$

$x_{1,3}$

$x_{2,0}$

$x_{2,1}$

$x_{2,3}$

$x_{3,0}$

$x_{3,1}$

$x_{3,2}$

$x_{0,1}$

0

4

4

0

2

2

0

2

2

0

2

2

$x_{0,2}$

0

0

4

0

2

2

0

2

2

0

2

2

$x_{0,3}$

0

0

0

0

2

2

0

2

2

0

2

2

$x_{1,0}$

0

0

0

0

2

2

4

2

2

4

2

2

$x_{1,2}$

0

0

0

0

0

4

2

2

4

2

2

4

$x_{1,3}$

0

0

0

0

0

0

2

2

4

2

2

2

$x_{2,0}$

0

0

0

0

0

0

0

2

2

4

2

2

$x_{2,1}$

0

0

0

0

0

0

0

0

4

2

4

4

$x_{2,3}$

0

0

0

0

0

0

0

0

0

2

2

2

$x_{3,0}$

0

0

0

0

0

0

0

0

0

0

2

2

$x_{3,1}$

0

0

0

0

0

0

0

0

0

0

0

4

$x_{3,2}$

0

0

0

0

0

0

0

0

0

0

0

0