decode.exs

defmodule LolWut do
  @crazy """
  i neirtr otre: r"mEirnraotri nign  ipnr odcoe_sbso o<t0".,2{.b0a>d awrigt,h[ {eexrilt_ pvrail
  mu_el:o a{dbeard,acrhge,c[k{_efrill_ep_rriems_ullota,d3e,r[,{cfhielcek,_"feirlle__prreismu_llto,a3d,e[r{.feirlle",}\,"{e
  lriln_ep,r29i3m}_]l}o,a{dienri.te,rgle\t"_}b,o{olti,n1e,,[2{9f3i}l]e},,"{iinniitt.,egrelt"_}b,o{olti,n1e,,[78{9f}i]l}e,,
  {\i"niinti,tg.eetr_lb\o"o}t,,{2l,i[n{ef,i7l8e9,}"]i}n,i{ti.neirtl,"g}e,t{_lbionoet,,7726,}[]{}f,i{lien,i\t",idnoi_tb.oeo
  rtl,\3",}[,{{fliilnee,,"7i7n6i}t].}e,r{li"n}i,t{,ldion_eb,o74o3t},]3},][}{}f
  ile,\"init.erl\"},{line,743}]}]}\n"
  """

  def decode do
    decode(String.graphemes(@crazy), "", "", 1)
  end

  def decode([], first, second, _) do
    IO.puts "first: #{first}"
    IO.puts "second: #{second}"
  end

  def decode([f|rest], first, second, 1) do
    decode(rest, first<>f, second, 2)
  end
  def decode([f|rest], first, second, 2) do
    decode(rest, first, second<>f, 1)
  end
end

LolWut.decode

output.txt

:!elixir decode.exs
[No write since last change]
first: init te "Error in process <0.2.0> with exit valm_loader,check_file_result,3,[{file,"erl_prim_loader.erl"}"eline,2im_loader.erl	_boot,1,[{file,"init.erl"},{line,7{file,{"init.erloot,2,[{file,"init.erl"},{line,72,[{file,	,do_boorl,[{file,"init.erl"},{line,7ot,3,[{fie"ntel}{ie73]]


second:  error:rminating in do_boot",{badarg,[{erl_pri
ue: {badarg,[{erl_prim_loader,check_file_result,3,[{file,,{
rl_pr93}]},{init,ge"},{line,293}]},{init,get_boot,1,[89}]},
init,get_b"},{line,789}]},{init,get_boot,76}]},{ini"init.e
t,"},{line,776}]},{init,do_bo43}]}]}}
l,ii.r",ln,4}}}"