return [[ 0, 0, 0, 0 ],
[ 0, 3, 0, 0 ],
[ 0, 6, 0, 0 ],
[ 13, 0, 0, 0 ],
[ 13, 3, 0, 0 ],
[ 13, 6, 0, 0 ],
[ 26, 0, 0, 0 ],
[ 26, 3, 0, 0 ],
[ 26, 6, 0, 0 ]];;