return [[ 0, 0, 0, 0 ],
[ 0, 3, 0, 0 ],
[ 0, 6, 0, 0 ],
[ 19, 0, 0, 0 ],
[ 19, 3, 0, 0 ],
[ 19, 6, 0, 0 ],
[ 38, 0, 0, 0 ],
[ 38, 3, 0, 0 ],
[ 38, 6, 0, 0 ]];;