{0}
{0, 4}
{0, 4, 5}
{0, 4, 5, 9}
{0, 4, 5, 9, 8}
{0, 4, 5, 9, 8, 7}
{0, 4, 5, 9, 8, 7, 6}
{0, 4, 5, 9, 8, 7, 6, 2}
{0, 4, 5, 9, 8, 7, 6, 2, 3}
{0, 4, 5, 9, 8, 7, 6, 2, 3, 1}
0 2 8 1 2 12 21 22 17 18