return [[ 0, 0, 0, 0 ],
[ 0, 0, 0, -1 ],
[ 0, 0, 0, -2 ],
[ 0, 1, 0, 0 ],
[ 0, 1, 0, -2 ],
[ 0, 2, 0, 0 ],
[ 0, 3, 0, 0 ],
[ 1, 1, 0, 0 ],
[ 1, 1, 0, -1 ],
[ 1, 2, 0, 0 ],
[ 2, 2, 0, -2 ],
[ 2, 3, 0, -2 ]];;