return [[ 0, 0, 0, 0 ],
[ 0, 0, 0, 4 ],
[ 0, 0, 0, 12 ],
[ 7, 0, 0, 0 ],
[ 7, 0, 0, 4 ],
[ 7, 0, 0, 12 ],
[ 14, 0, 0, 0 ],
[ 14, 0, 0, 4 ],
[ 14, 0, 0, 12 ],
[ 21, 0, 0, 0 ],
[ 21, 0, 0, 4 ],
[ 21, 0, 0, 12 ]];;