_15_4_d4b := [ 
[1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0],
[1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 2, 1, 0, 0],
[1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0],
[0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1],
[2, 2, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0],
[2, 0, 2, 2, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 2, 0, 0, 0, 0],
[0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 2, 0, 0, 0, 0],
[0, 0, 0, 2, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0 ]
];