"{} nests to:  {}
{1, 2, 4} nests to:  {1, {2, {{4}}}}
{3, 1, 3, 1} nests to:  {{{3}}, 1, {{3}}, 1}
{1, 2, 3, 1} nests to:  {1, {2, {3}}, 1}
{3, 2, 1, 3} nests to:  {{{3}, 2}, 1, {{3}}}
{3, 3, 3, 1, 1, 3, 3, 3} nests to:  {{{3, 3, 3}}, 1, 1, {{3, 3, 3}}}"