@inner1 = (0, 1, 2);
@inner2 = (1, 4, 7);
@inner3 = (2, 5, 8);
@inner4 = (6, 7, 9);

@array1 = (@inner1, @inner2, @inner3, @inner4);;

print @array1;;
0 1 2 1 4 7 2 5 8 6 7 9

@array2 = (@inner1, @inner2, @inner3, @inner4);;

print @array2;;
0 1 2 1 4 7 2 5 8 6 7 9

%hash = (array1, @array1, array2, @array2);;
pp \%hash;;
{
  "0"      => 1,
  "1"      => 4,
  "2"      => 5,
  "4"      => 7,
  "5"      => 8,
  "6"      => 7,
  "7"      => 9,
  "8"      => 6,
  "9"      => "array2",
  "array1" => 0,
}