DB<1> @x = ( [qw(a b c)], [qw(d e f)], [qw(g h i)])

  DB<2> x @x
0  ARRAY(0x15d5240)
   0  'a'
   1  'b'
   2  'c'
1  ARRAY(0x1cbe3f4)
   0  'd'
   1  'e'
   2  'f'
2  ARRAY(0x1cbe430)
   0  'g'
   1  'h'
   2  'i'
  DB<3>