return [[ 0, 0, 0, 0 ],
[ 0, 0, 0, -1 ],
[ 0, 0, 0, -2 ],
[ 0, 0, 0, -3 ],
[ 0, 0, 0, -4 ],
[ 0, 0, 0, -5 ],
[ 0, 0, 0, -6 ],
[ 0, 0, 0, -7 ],
[ 0, 4, 0, 0 ],
[ 0, 4, 0, -1 ],
[ 0, 4, 0, -2 ],
[ 0, 4, 0, -3 ],
[ 0, 4, 0, -4 ],
[ 0, 4, 0, -5 ],
[ 0, 4, 0, -6 ],
[ 0, 4, 0, -7 ],
[ 4, 4, 0, 0 ],
[ 4, 4, 0, -1 ],
[ 4, 4, 0, -2 ],
[ 4, 4, 0, -3 ],
[ 4, 4, 0, -4 ],
[ 4, 4, 0, -5 ],
[ 4, 4, 0, -6 ],
[ 4, 4, 0, -7 ]];;