return [[ 0, 0, 0, 0 ],
[ 0, 3, 0, 0 ],
[ 0, 6, 0, 0 ],
[ 5, 0, 0, 0 ],
[ 5, 3, 0, 0 ],
[ 5, 6, 0, 0 ],
[ 10, 0, 0, 0 ],
[ 10, 3, 0, 0 ],
[ 10, 6, 0, 0 ]];;