return [[ 0, 0, 0, 0, 0, 0, 0 ],
[ 0, 0, 4, 4, 12, 0, 0 ],
[ 0, 0, 8, 8, 8, 0, 0 ],
[ 0, 0, 12, 12, 4, 0, 0 ],
[ 0, 4, 3, 11, 13, 0, 0 ],
[ 0, 4, 7, 15, 9, 0, 0 ],
[ 0, 8, 2, 2, 14, 0, 0 ],
[ 0, 8, 6, 6, 10, 0, 0 ],
[ 0, 8, 10, 10, 6, 0, 0 ],
[ 0, 8, 14, 14, 2, 0, 0 ],
[ 0, 12, 1, 9, 15, 0, 0 ],
[ 0, 12, 5, 13, 11, 0, 0 ],
[ 8, 0, 0, 0, 8, 0, 0 ],
[ 8, 0, 4, 4, 4, 0, 0 ],
[ 8, 0, 8, 8, 0, 0, 0 ],
[ 8, 0, 12, 12, 12, 0, 0 ],
[ 8, 4, 3, 11, 5, 0, 0 ],
[ 8, 4, 7, 15, 1, 0, 0 ],
[ 8, 8, 2, 2, 6, 0, 0 ],
[ 8, 8, 6, 6, 2, 0, 0 ],
[ 8, 8, 10, 10, 14, 0, 0 ],
[ 8, 8, 14, 14, 10, 0, 0 ],
[ 8, 12, 1, 9, 7, 0, 0 ],
[ 8, 12, 5, 13, 3, 0, 0 ]];;