diff --git a/2024/day04.livemd b/2024/day04.livemd
new file mode 100644
index 0000000..dd0859b
--- /dev/null
+++ b/2024/day04.livemd
@@ -0,0 +1,204 @@
+<!-- livebook:{"persist_outputs":true} -->
+
+# Day 04
+
+```elixir
+Mix.install([:kino_aoc, :nx])
+```
+
+## Section
+
+<!-- livebook:{"attrs":"eyJhc3NpZ25fdG8iOiJwdXp6bGVfaW5wdXQiLCJkYXkiOiI0Iiwic2Vzc2lvbl9zZWNyZXQiOiJBRFZFTlRfT0ZfQ09ERV9TRVNTSU9OIiwieWVhciI6IjIwMjQifQ","chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->
+
+```elixir
+{:ok, puzzle_input} =
+  KinoAOC.download_puzzle("2024", "4", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))
+```
+
+<!-- livebook:{"output":true} -->
+
+```
+{:ok,
+ "MASAMXMSSXXMAMXXMXMASXMASXMMSMSMMMAXMASASMMSSMSXAXMASMMSMMMSSMSASMSSSSMSMSMXXMXMAXAMXMSMSSXSAMXMSSXSXSXMASXMSASXMMXSXMSSSSSXSAMMAMXSXXMAAXSA\nMASMMXMASAXASMSMMMSAMXSMSAMXAAAAAXAMXASXAMAAAAMMSMMMMMASXAAAAMMAMAMMASAAAAXMXMSSSSSSMMSAMAXAXXSMAMSAMXASAXXASAMXASAMAXXMASAAAMAMAXXMASXSXSXS\nMMXAXMMMSXMAMAAXAAXAAAXXSMMSMSMSMXAXMXSMMMMSSMXAMXAAXMAMMMMSSMMAMAMMAMMMMMXSAAXAAMMAXXSAMXMSMAXMAMSMSSXMASMMMSXSXMAXMMSMMMMMMSASMSXMAMAXXSAM\nSXSAMASASMSXMSMSMSSMMMMMMXAMXMMXMASMMMMAXXAAAMMMSSSSSMASXXAAXASMSXXMXSXSXSASMSMMSMSAMMMAMXAAMASXMMSXMXMMMXASAXMSAASAMXSAAMXSXMASAXMMXSMSMMAM\nAAAXXXMASASXMXMAXXMMASAASMXSASASXAAAAMSSMMMSXMAAMMMMMXAXMMMMSAMXAMASAMXSAMASXXAXAAMAMXSAMXSXSMMASAMSMASAAMSMMSSXMAXASASMMSAMASAMAMSMAAXMASXM\nMSMMXXMMMAMAMMMMMMXSAXXAMMMMXSAXMMXXAMXAAMMXMASXMAAASMMXAAMXAXAMMMAMAMAMAMXMASXMMXMAAXMAXMAMXMSAMASXMAXMSXMAMXXXMASAMAMAXMMMAAXXAAAMXSXMMMAS\nMXAXAMXXMMMMSAMAASMMMSMMASASAMAMAXMSXMSMMXAMXAXMMSSXSASXSSSMAMSMXMXSAMSSSMAMXMXAMAXXMMSAXAXMMXMASMMMMSSMMASAMMAMSMMAMAXSMXXMSSSSSSMXAXMSSMMM\nASXMMXSAMXAASXXMXSAAAXASAMMMASMSSSMAAMMXMMSSMASAMAMMMAMMAXMAXMASXMAXMSAAASASAMXSSMXSAAXSSMXAAXXAXMAMXMAMSMMAXMAAAAMXMAMXASXAMAMXMXMMAXAAXAXS\nMAASMAMMSSMMSMSSXSMMXSMMASMSXMAAASMMMMAAMAMAMXAXAASMSSMMMMXSMSXSMXSXMXMXMSXMASAMAAAMMMMMMXXXSXMASMXMXMMMSXMSAMASMSMAXMASAAMXMMSSMASXXMXMAXMA\nSAMXMXSAXAMASMXAASXSMMAXXMASAMMMMMMXXXSXMASAMXMASXSAAMXXXMMXMXAXMAMAMXXAAMAXAMASMMMSMMXSMMMXMAAMXXAXSXSASASXSMAMAAXMMSMMXMAXSAAAMXSASMSSXSAS\nMMXSSXMXSAMASXXMXMAXAXXMSMMMXSAMXXMSXMMASXSXSXXAXMMMMMXMAXAMXMMMMASAMXSMSSSMSMMMMMAXXMAXAAAAXXSXXSASXAMAXXMAXMAMSMMSASXMAXMXMMSXSAMXMAAXASAM\nASAMXAMXSXMAMMMXAMSSSMSAXXXMSXASASXXAASAMXMAMAMSXXAXASASASXXSAAAMASAMAXXAAAMXASXSMXXAMASMMSMSAMAMXXXMMMSMXMMMXMXAAAMXSASXSSSXAAAMMAMMMMMAMAM\nMMMSSXMXMAMXMSMXMSAAAAMMMXMSMSMMAAMSSMXAMMMAMXMXXSXSMSAMXSMAMSXSXAXAMSMMMSMMSAMAXAMXXAXXXAAAMXXMMSMMMSAMXXSASASXSMMXMSAMAAAAMMSXMAAMAMAMXMAM\nXXAXMASMSAMAAAAASMMMMXMASMMAAAXMAMAAMMMSAMSAMSAXMAAMMMAMXMMMMAXXAMXSMMSMAXXXXAMSMMSASMMMMSMXMSMMAAAAAMMMXMMAMASAMAAAXMSMMMMMXXMASXSSSSXSASAS\nSASAMXMAMMSASMSMXASMMASXSASMSSXSAMMXAAAASASAMXMXAXMSASASMXAAMMSMMSAMXAAMASMMSMMXAXMXXAAXXAAASAAMSSSMSXMXSAMAMAMASMSMSAMXMMASMMXMMAAAAXASMSSM\nXAMASXSXSASAXMXMSXMASAXASMSAAXXMAMSSSMSAXMMMSAMXMSASASAMAMMMSAAMAMASMSXSAXAMAMXMXMASXSMMSXSXMAXMAAXAMASXMAMXSXMXMXAXMAMAMAAAXMSXMMMMMMXMXXXM\nMMMASMAAMMMAMASASAMXMASMMAMMMMMXMMXAMAMXMAAXMAXXXMAMXMMMSSMAMMXMXSXMAXMMMSSSXSMSAMXSAXMASMMMASXMXSXXXAMAXAMMSASMSSSMSASASMXSAMAMXXAASXMMSASX\nAXMAXXMXMXSAMMMAMAMXMXAMXSMSXASASMMAMXMSSXMSXSAMXMXMMXSXAAXMASXMXAMSXSAAXXAXXXAAXAAMMMXXMAMMAMAAAMMSMSSMMSSMSAMAAAAASASASAMXXAXMMSAXSAAXMASX\nSXMASXXXMAXASMMMMMSXMMASXAAXSXSXSASMMASMSAXMAXAMXXMAMASMSSMMAXAAASASASMMAAMMXMSMSMXSAMXMXSXMASMMMSAXMMAXSMAMMXMMMSMMMAMAMXMAMXMAMAMMSXMXMXMX\nMAMMAMXAMXSSMMXAAXAMASAMXMMASXSXSAMMSMSAXMASASAMMMAAMAXAMXXMMSMMAASMAMMXMMXSAAAAXMASASMMAMXXMAAAXMXSSMXMAXAMXAMSMMMSMSMSMAMMSAXMASAAXMMASAAX\nSAXSAXSXSXMMASMSSMXMMMASXXAAMMMAMAMAAMMMMAMMMMAMAASXMSSSXMAXMAXAXMXMSMAXXAASMMMSMXMSAMXMASMSSSSMMSAXMASAMSMSXMMAAAAAXAAXSAMMMMXXXMMXSMSASMSM\nMAMAXMMMXAASAMAMMMMMSSMSXSMXSAMSMMMSXSASAAXAAMAMSMMAMAAMAMXMSASXSXXXXAMXMMXSMSMXMAMMAMXSASAAXAAAXMAMSAMAXAMSASMSSMSSSMMMSMSAAXSSSXSMXAMXSXMX\nMSMSMMXSMSMMAXMASAMSAMXMASAAMXSAAXAMXSMSSSSSXSAXXXXAMMSMXXSXMASAXXMASAMXMSXXAAAASAXMAMMMMMMMMSAMMAMXMMXSMXMSAMAAAAXXMAXMXMSMMSAMAAMXSAMXXASM\nAMAMAXAMXXXSXMXAXMXMASAMXMMMSMSXSMMSAMXXAXAAXAXMASMSMSMXXXAMMMMMMSMXSMMSAMXMSMSMSMSSMMMASXSSMMXSMAXMASAMXXXMMMMMMXMMSMMSAMXASMAMMSMMAAXXMASM\nXMAMMMXSAMASMAMXSXXSAMAMSMMAAASMXXMAAASMXMMMMMXXXAAAMAMMMXMAAMAMAMXASAAAAMAAAAAMXMMASXSXMAMAAMAMXSXSAMXMAMXSXAMSMSAMAXAXAMAMMSSMXMXAXXMSAMXM\nSMXSAAAMAMAMMSMAXAMMXSAMAAXSMXXASXSMSMAMXAAXMXMMMMSMMAMSAAXSXSAMAMXXSMMSASXSMSMSAMSAMMSAMXMSAMXSAXMMXMAXAMAAMAMAAAXSASMSSMXSAAXMASASAMXSAASM\nAAAAMMSSXMASAAMSXSAMXSXSXSMXMASASAMXMAASASXMXAAXAXAASAXASXMMASXSASMMMXAXXMAAMXXXMMMXMAMAMXMXAMXSAXAXSXMXAMMXSAMMSMMMMSMAMXMMMSSMXAAXAAAMXMXM\nMMMSAAXMMMSMMSSMAMMMMMMMMXAXSXSAMXMAXXXSXAAMSSSXMXSXMXSMMSAMAMAMXSAAAMXMAMMMMMSMSXSMMMXMMAXSAMAMASMXMASXSMMASXSAMXSAMXMAMAXASXXMMMMMMMXMMSSM\nSAMAMMSMSMXAMMXMAMMSASASASAMMAMMMMMXMSAMXMXMAAMASMMXSMAXAXMMMMSMMMXSMSSSSSMAAAMMSAMMAMASXSMSAMXSASAXMAMAMAMMSAMXSASASXSMSMSXSXAMAAAAXSASAAXX\nSMSMXXA" <> ...}
+```
+
+```elixir
+# puzzle_input
+search_box =
+  puzzle_input
+  |> String.split("\n", trim: true)
+  |> Enum.map(&String.to_charlist/1)
+```
+
+<!-- livebook:{"output":true} -->
+
+```
+[~c"MASAMXMSSXXMAMXXMXMASXMASXMMSMSMMMAXMASASMMSSMSXAXMASMMSMMMSSMSASMSSSSMSMSMXXMXMAXAMXMSMSSXSAMXMSSXSXSXMASXMSASXMMXSXMSSSSSXSAMMAMXSXXMAAXSA",
+ ~c"MASMMXMASAXASMSMMMSAMXSMSAMXAAAAAXAMXASXAMAAAAMMSMMMMMASXAAAAMMAMAMMASAAAAXMXMSSSSSSMMSAMAXAXXSMAMSAMXASAXXASAMXASAMAXXMASAAAMAMAXXMASXSXSXS",
+ ~c"MMXAXMMMSXMAMAAXAAXAAAXXSMMSMSMSMXAXMXSMMMMSSMXAMXAAXMAMMMMSSMMAMAMMAMMMMMXSAAXAAMMAXXSAMXMSMAXMAMSMSSXMASMMMSXSXMAXMMSMMMMMMSASMSXMAMAXXSAM",
+ ~c"SXSAMASASMSXMSMSMSSMMMMMMXAMXMMXMASMMMMAXXAAAMMMSSSSSMASXXAAXASMSXXMXSXSXSASMSMMSMSAMMMAMXAAMASXMMSXMXMMMXASAXMSAASAMXSAAMXSXMASAXMMXSMSMMAM",
+ ~c"AAAXXXMASASXMXMAXXMMASAASMXSASASXAAAAMSSMMMSXMAAMMMMMXAXMMMMSAMXAMASAMXSAMASXXAXAAMAMXSAMXSXSMMASAMSMASAAMSMMSSXMAXASASMMSAMASAMAMSMAAXMASXM",
+ ~c"MSMMXXMMMAMAMMMMMMXSAXXAMMMMXSAXMMXXAMXAAMMXMASXMAAASMMXAAMXAXAMMMAMAMAMAMXMASXMMXMAAXMAXMAMXMSAMASXMAXMSXMAMXXXMASAMAMAXMMMAAXXAAAMXSXMMMAS",
+ ~c"MXAXAMXXMMMMSAMAASMMMSMMASASAMAMAXMSXMSMMXAMXAXMMSSXSASXSSSMAMSMXMXSAMSSSMAMXMXAMAXXMMSAXAXMMXMASMMMMSSMMASAMMAMSMMAMAXSMXXMSSSSSSMXAXMSSMMM",
+ ~c"ASXMMXSAMXAASXXMXSAAAXASAMMMASMSSSMAAMMXMMSSMASAMAMMMAMMAXMAXMASXMAXMSAAASASAMXSSMXSAAXSSMXAAXXAXMAMXMAMSMMAXMAAAAMXMAMXASXAMAMXMXMMAXAAXAXS",
+ ~c"MAASMAMMSSMMSMSSXSMMXSMMASMSXMAAASMMMMAAMAMAMXAXAASMSSMMMMXSMSXSMXSXMXMXMSXMASAMAAAMMMMMMXXXSXMASMXMXMMMSXMSAMASMSMAXMASAAMXMMSSMASXXMXMAXMA",
+ ~c"SAMXMXSAXAMASMXAASXSMMAXXMASAMMMMMMXXXSXMASAMXMASXSAAMXXXMMXMXAXMAMAMXXAAMAXAMASMMMSMMXSMMMXMAAMXXAXSXSASASXSMAMAAXMMSMMXMAXSAAAMXSASMSSXSAS",
+ ~c"MMXSSXMXSAMASXXMXMAXAXXMSMMMXSAMXXMSXMMASXSXSXXAXMMMMMXMAXAMXMMMMASAMXSMSSSMSMMMMMAXXMAXAAAAXXSXXSASXAMAXXMAXMAMSMMSASXMAXMXMMSXSAMXMAAXASAM",
+ ~c"ASAMXAMXSXMAMMMXAMSSSMSAXXXMSXASASXXAASAMXMAMAMSXXAXASASASXXSAAAMASAMAXXAAAMXASXSMXXAMASMMSMSAMAMXXXMMMSMXMMMXMXAAAMXSASXSSSXAAAMMAMMMMMAMAM",
+ ~c"MMMSSXMXMAMXMSMXMSAAAAMMMXMSMSMMAAMSSMXAMMMAMXMXXSXSMSAMXSMAMSXSXAXAMSMMMSMMSAMAXAMXXAXXXAAAMXXMMSMMMSAMXXSASASXSMMXMSAMAAAAMMSXMAAMAMAMXMAM",
+ ~c"XXAXMASMSAMAAAAASMMMMXMASMMAAAXMAMAAMMMSAMSAMSAXMAAMMMAMXMMMMAXXAMXSMMSMAXXXXAMSMMSASMMMMSMXMSMMAAAAAMMMXMMAMASAMAAAXMSMMMMMXXMASXSSSSXSASAS",
+ ~c"SASAMXMAMMSASMSMXASMMASXSASMSSXSAMMXAAAASASAMXMXAXMSASASMXAAMMSMMSAMXAAMASMMSMMXAXMXXAAXXAAASAAMSSSMSXMXSAMAMAMASMSMSAMXMMASMMXMMAAAAXASMSSM",
+ ~c"XAMASXSXSASAXMXMSXMASAXASMSAAXXMAMSSSMSAXMMMSAMXMSASASAMAMMMSAAMAMASMSXSAXAMAMXMXMASXSMMSXSXMAXMAAXAMASXMAMXSXMXMXAXMAMAMAAAXMSXMMMMMMXMXXXM",
+ ~c"MMMASMAAMMMAMASASAMXMASMMAMMMMMXMMXAMAMXMAAXMAXXXMAMXMMMSSMAMMXMXSXMAXMMMSSSXSMSAMXSAXMASMMMASXMXSXXXAMAXAMMSASMSSSMSASASMXSAMAMXXAASXMMSASX",
+ ~c"AXMAXXMXMXSAMMMAMAMXMXAMXSMSXASASMMAMXMSSXMSXSAMXMXMMXSXAAXMASXMXAMSXSAAXXAXXXAAXAAMMMXXMAMMAMAAAMMSMSSMMSSMSAMAAAAASASASAMXXAXMMSAXSAAXMASX",
+ ~c"SXMASXXXMAXASMMMMMSXMMASXAAXSXSXSASMMASMSAXMAXAMXXMAMASMSSMMAXAAASASASMMAAMMXMSMSMXSAMXMXSXMASMMMSAXMMAXSMAMMXMMMSMMMAMAMXMAMXMAMAMMSXMXMXMX",
+ ~c"MAMMAMXAMXSSMMXAAXAMASAMXMMASXSXSAMMSMSAXMASASAMMMAAMAXAMXXMMSMMAASMAMMXMMXSAAAAXMASASMMAMXXMAAAXMXSSMXMAXAMXAMSMMMSMSMSMAMMSAXMASAAXMMASAAX",
+ ~c"SAXSAXSXSXMMASMSSMXMMMASXXAAMMMAMAMAAMMMMAMMMMAMAASXMSSSXMAXMAXAXMXMSMAXXAASMMMSMXMSAMXMASMSSSSMMSAXMASAMSMSXMMAAAAAXAAXSAMMMMXXXMMXSMSASMSM",
+ ~c"MAMAXMMMXAASAMAMMMMMSSMSXSMXSAMSMMMSXSASAAXAAMAMSMMAMAAMAMXMSASXSXXXXAMXMMXSMSMXMAMMAMXSASAAXAAAXMAMSAMAXAMSASMSSMSSSMMMSMSAAXSSSXSMXAMXSXMX",
+ ~c"MSMSMMXSMSMMAXMASAMSAMXMASAAMXSAAXAMXSMSSSSSXSAXXXXAMMSMXXSXMASAXXMASAMXMSXXAAAASAXMAMMMMMMMMSAMMAMXMMXSMXMSAMAAAAXXMAXMXMSMMSAMAAMXSAMXXASM",
+ ~c"AMAMAXAMXXXSXMXAXMXMASAMXMMMSMSXSMMSAMXXAXAAXAXMASMSMSMXXXAMMMMMMSMXSMMSAMXMSMSMSMSSMMMASXSSMMXSMAXMASAMXXXMMMMMMXMMSMMSAMXASMAMMSMMAAXXMASM",
+ ~c"XMAMMMXSAMASMAMXSXXSAMAMSMMAAASMXXMAAASMXMMMMMXXXAAAMAMMMXMAAMAMAMXASAAAAMAAAAAMXMMASXSXMAMAAMAMXSXSAMXMAMXSXAMSMSAMAXAXAMAMMSSMXMXAXXMSAMXM",
+ ~c"SMXSAAAMAMAMMSMAXAMMXSAMAAXSMXXASXSMSMAMXAAXMXMMMMSMMAMSAAXSXSAMAMXXSMMSASXSMSMSAMSAMMSAMXMSAMXSAXMMXMAXAMAAMAMAAAXSASMSSMXSAAXMASASAMXSAASM",
+ ~c"AAAAMMSSXMASAAMSXSAMXSXSXSMXMASASAMXMAASASXMXAAXAXAASAXASXMMASXSASMMMXAXXMAAMXXXMMMXMAMAMXMXAMXSAXAXSXMXAMMXSAMMSMMMMSMAMXMMMSSMXAAXAAAMXMXM",
+ ~c"MMMSAAXMMMSMMSSMAMMMMMMMMXAXSXSAMXMAXXXSXAAMSSSXMXSXMXSMMSAMAMAMXSAAAMXMAMMMMMSMSXSMMMXMMAXSAMAMASMXMASXSMMASXSAMXSAMXMAMAXASXXMMMMMMMXMMSSM",
+ ~c"SAMAMMSMSMXAMMXMAMMSASASASAMMAMMMMMXMSAMXMXMAAMASMMXSMAXAXMMMMSMMMXSMSSSSSMAAAMMSAMMAMASXSMSAMXSASAXMAMAMAMMSAMXSASASXSMSMSXSXAMAAAAXSASAAXX",
+ ~c"SMSMXXAAAAMMMMASASASASXMASAMXMAXAXSXMAAXMSXMAMXAMAMAMXSMMSXSXAAMXSMXXAAMAAMSMMSAMXMMASMSAMXSAMXMASXMMMSASAMAMXMAMASAMMSMAAXMMMSSSSSSSMAMMMMX",
+ ~c"XAAXASMSMSMAAXXXAXMMMMAMAMAMXXSSMXXMAMXMAMASXSMMMAMAMMXXAAAXMSXSAMAAMMSMSSMMMAMXSAMSASAMXMASXMAMMMMAXMAXXMSAMXMAMXMAMAMMMXMSXAAMAAAXAMXMSASA",
+ ~c"MXMXAMXAXMMSXSMMSMSSSSMMSSXMXXXAMXXSSSSMXSAMAMAAXSMMMAAMSMXXMAMMASASMAXMAAAAMMSASAXMSMXMXMASMXXXAAXMAMMAXMSXSASXSXSAMSSMSMASMMMSAMMMSXMXXASA",
+ ~c"SASXSSSXMSXMAAAAXAAAXMASXMAAXXMSAMMAAAXAAMASAMMMAMASMSXAXXAXMSSSXMAXMXSMSSMMSMAXMMMXAMXXMXAXMASMSMXSAASMXAXXSAMSAASXMAAAXMAXXAASMAMAXAXXMMMM",
+ ~c"SASAXAMXASAXSSSMMMMMMXMSASXMXMAXAXMMMMMMMMXAXXAMXXAMAMXSAMAMSAAXMMMMSXSAAXMASMMMMMXMMAMMAMSSMAXAAAASAMAAMSMXMSMMMMMMASMMXMMSMXMSSSMASMMAAAAA",
+ ~c"MSMXMAMSSMMMXAAAXXMASMXSAMSAMXSMSMMASAAXMXAAMMXXSMSSXMXXASAMXMSMSAMXMAMMMMMMMMAAAAAAXMMAXXMMMMMSMMMSAXMMMMAXAXXAAAXXAXAMXAAAXMMMMMMAMMSXSMSS",
+ ~c"SAMXSMMXXAAAMMMSAMXSMAAMAMMMXMXXAAMASXSXMSXSXSXASAMXAMXSXMAMMXMASASXMMMSXXSMMSSSSSSSSMSSSMXSAXXMAXAXXMXSAXMMMXSSSXMMSXMMSMSSSXSAAAMMXMXMMMXM",
+ ~c"XAMMASMSSMMSMAAXXAXMXMMSMMASASXASXMASAMXXSAMAAMMMAMSAMAXMASXMAMMMAMXAMSMSXAAMXAAAAMAAAAAAAAMXXMXMMSSMSASMMXAXAXMAXSAMAMXSAMAAMASXMXMAMMSAXAM",
+ ~c"SSMMSAMXAASMXMMSMMMSAMXXXSASASAXAAMAMAMMMMAMMXSASAMMAMXXXAXAMMSMSSSMSMSAXSSMMMMMMXMMMMMSMMMXMMAASAMAAMASAASXMMXMXXMAMXMMSAMMMMXASXSSXSASASMS",
+ ~c"XAXSMMSSSMMXAMAAAAXMMSSMAXXMXMXSSXMXMAMAAMXMXASASASMSMXSAMXMMSAMMAAAXAMXMMMSMXSAMXSAAXXAMXSAASMMSAMMMMMMMMAAMAMSASMSMASASAMSMXSAMXAAAAXMAMAA",
+ ~c"MXMXAAXMMMMSSMSSSSSMASAMSSMXXSAXAMMSSXSSSMSMMXMAMAMMXSAMXSAMXSASMSMMMSMMXMXAMXSAMXSSMMAMXAMMMMSASXMASMXSSMSSMASMASAXSMMASXMXMMAASMMMMMMMAMAM",
+ ~c"MXXMMMSMXSAAAAAXAXAMMXAMAAAAMXXSAAAAXXMAMAXXMXMMMSMMXMXSASASASAMXXXAAXAMASAXMASXMMMMSMAXMMSXXAMMMMSAXSAMXAMXMMSMMMMXAXMAMXMASASMMAXSXSAMAXAX",
+ ~c"MSMXAXXAAMMSMMMMSMSMMSMMXSMSXSMSXMMSMSMAMSMSMXMXMMAAMMXMASMMASAMXXSMXSXMAXAASASASXAAXXXMASAMMSMXMXMXSMXMMAMMMMXXXXXSMMMMSSXXAMMASMXAAMAMSMMS",
+ ~c"AAASXMMMMSMAXXXAAMAAXSXSMXAMAAASAXMAXAAXMXAMXAXAMMXMAXAMMMMMAXAXMMXMXSAMASXXMASAMSMMAXMAMXASAMMSMAXMMMSASAMAAAAMXMXAXXXSAMMMMASAMXSMSMSMMAMX",
+ ~c"SAXMSAAAAAMMMSMSSSMSMMAMAMAMXMSSMMMXASAMXMAMSMSXSSMSXMAXAAXMSSMMXMMSASMMMXXAMAMAMXMAXMASMSAMASASXSXSAAMXSAMSAMXAAAMMSMXMASAXSMMAMXAAMAXAMAMX",
+ ~c"AMMASXMMSSSMASAMAAXXAMAMMSMMXXXXAAMXMMXXXMMMMAAAXMAXMASMSXSXAAXMAXSMAXXAXMSMMMSXMSMXMAXAMMMMAMXMAMAMMMSASMMXAXMSMSAMAMMSAMMXSAMAMXMSMMMSSSMM",
+ ~c"SSMAMAMAMAAMAMAMXMMSAMXMXAAMAMMSSMSMXSXXMAXAMMMSMMSMXXMAXMSMSSMSXXAMSMSMSAMASAMXAAMSSSMSMAXAAXAMSMSMSXMASASMSMMAAXAMAMAMAMXMSAMXMMAMXXAAAAXX",
+ ~c"MAMXSXMAMSMMXSXMASAMSMASMSSSMXAAXSAMAXMSSXSAMAAAAMMMSAMXMAXAXAMAXMXMXAMASXSAMASXMXSAAXAXSASMMSXSXAMAMXMXMXMAMMSASXSMSASMSMSXSMMAMMSMMMSSSMAA",
+ ~c"SMMXMASAXMXMASASMSXSASMSAAAAMMMMSMMMMSMMAXAMSSSSXMAASXXMMAASMMMAXSAMMXMAMMMMSAMXMMMMSMMMMMSAASMMMSMAMSASMAMSMASAMAMAMAMAXXAAMXMSMMXAXMAAAXXM",
+ ~c"XAMXXXASAMAMXSAMASMAMMXMXMMMMASXMMXSAAAMMAMMAXMMMSMAXMAXASMXAMMAXSASMSMASXSASAMMAAXAMMXAXASMMMAAAXXAMXAXMAMAMXMSMXMXMAMSMMMSMMMXAASAMAMSMMMM",
+ ~c"SSMMSMAXXSXSAMAMAMAAXMAMXSMMSASMSMAMSSSMXMXMMSXAAXXAASMMMMASMMMXMSAMAAMXSXSAMAMXAMSASASASAMSXSSMSSSMMMAMSSSXSAAXMMMMSXMASXAXXXASMMMAAMXXXAAM",
+ ...]
+```
+
+## Part 1
+
+```elixir
+defmodule CeresSearch do
+  def rows(rows), do: rows |> Enum.map(&count(&1, 0)) |> Enum.sum()
+
+  def count([], acc), do: acc
+  def count(~c"XMAS" ++ rest, acc), do: count([?S | rest], acc + 1)
+  def count(~c"SAMX" ++ rest, acc), do: count([?X | rest], acc + 1)
+  def count([_ | rest], acc), do: count(rest, acc)
+
+  def cols(rows) do
+    rows
+    |> Enum.zip()
+    |> Enum.map(&Tuple.to_list/1)
+    |> rows()
+    |> dbg()
+  end
+
+  def diagonals(rows) do
+    map =
+      for {row, x} <- Enum.with_index(rows),
+          {val, y} <- Enum.with_index(row),
+          into: %{},
+          do: {{y, x}, val}
+
+    {w, h} = Enum.max(Map.keys(map))
+
+    0..max(w, h)
+    |> gen_diagonals()
+    |> then(fn diags ->
+      Enum.map(diags, &extract(map, &1))
+    end)
+    |> rows()
+  end
+
+  def gen_diagonals(_..max//_ = range) do
+    d1 =
+      for n <- range do
+        for(
+          y <- 0..n,
+          x = n - y,
+          do: {y, x}
+        )
+      end
+
+    d2 =
+      for n <- range do
+        for(
+          y <- 0..n,
+          x = max - n + y,
+          do: {y, x}
+        )
+      end
+
+    diag1 = d1 ++ d2
+
+    diag2 =
+      Enum.map(diag1, fn d ->
+        Enum.map(d, fn {y, x} -> {max - y, x} end)
+      end)
+
+    Enum.uniq_by(diag1 ++ diag2, &Enum.sort/1)
+  end
+
+  def extract(map, keys) do
+    for key <- keys, val = map[key], do: val
+  end
+
+  def search_all(box) do
+    cols(box) + rows(box) + diagonals(box)
+  end
+end
+```
+
+<!-- livebook:{"output":true} -->
+
+```
+{:module, CeresSearch, <<70, 79, 82, 49, 0, 0, 31, ...>>, {:search_all, 1}}
+```
+
+```elixir
+CeresSearch.search_all(search_box)
+```
+
+<!-- livebook:{"output":true} -->
+
+```
+2401
+```
+
+## Part 2
+
+```elixir
+map =
+  for {row, x} <- Enum.with_index(search_box),
+      {val, y} <- Enum.with_index(row),
+      into: %{},
+      do: {{y, x}, val}
+
+Enum.count(map, fn
+  {{y, x}, ?A} ->
+    [map[{y + 1, x + 1}], map[{y - 1, x - 1}]] in [~c"MS", ~c"SM"] and 
+      [map[{y - 1, x + 1}], map[{y + 1, x - 1}]] in [~c"MS", ~c"SM"]
+  _ ->
+    false
+end)
+```
+
+<!-- livebook:{"output":true} -->
+
+```
+1822
+```
+
+<!-- livebook:{"offset":14266,"stamp":{"token":"XCP.T-RaxkkrFX_OdT79HvWI46TqX7It60uksnJ1LTiQVcPcCTg_ZZN1SjjXIgHd4F397ANKRpGPP5xOXl4FWp7rCtZ86gir5tQaVrJ8BqeDCy_3leOOuggQbLw1uB3x5qEdZBg","version":2}} -->