data/advent13a.txt

   1 [1,1,3,1,1]
   2 [1,1,5,1,1]
   3
   4 [[1],[2,3,4]]
   5 [[1],4]
   6
   7 [9]
   8 [[8,7,6]]
   9
  10 [[4,4],4,4]
  11 [[4,4],4,4,4]
  12
  13 [7,7,7,7]
  14 [7,7,7]
  15
  16 []
  17 [3]
  18
  19 [[[]]]
  20 [[]]
  21
  22 [1,[2,[3,[4,[5,6,7]]]],8,9]
  23 [1,[2,[3,[4,[5,6,0]]]],8,9]