diff --git a/elisp/day-6/advent-of-code.el b/elisp/day-6/advent-of-code.el
new file mode 120000
index 0000000..4a02002
--- /dev/null
+++ b/elisp/day-6/advent-of-code.el
@@ -0,0 +1 @@
+../advent-of-code.el
\ No newline at end of file
diff --git a/elisp/day-6/input.txt b/elisp/day-6/input.txt
new file mode 120000
index 0000000..58d542f
--- /dev/null
+++ b/elisp/day-6/input.txt
@@ -0,0 +1 @@
+../../input/day-6.txt
\ No newline at end of file
diff --git a/elisp/day-6/solution.el b/elisp/day-6/solution.el
new file mode 100755
index 0000000..3795c5f
--- /dev/null
+++ b/elisp/day-6/solution.el
@@ -0,0 +1,73 @@
+#!/usr/bin/env -S emacs --script
+
+;; -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2022 
+
+;; This program is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+(add-to-list 'load-path default-directory)
+
+(require 'cl-lib)
+(require 'ert)
+(require 'advent-of-code)
+
+(defun -all-different? (items)
+  (cl-loop for (item . rest) on items
+           if (seq-contains rest item)
+           return nil
+           finally (return t)))
+
+(defun -part-1 (input)
+  (cl-loop for (a b c d) on (string-to-list input)
+           for x from 0
+           while d
+           if (-all-different? (list a b c d))
+           return (+ x 4)))
+
+(defun -part-2 (input)
+  (cl-loop for (a b c d e f g h i j k l m n) on (string-to-list input)
+           for x from 0
+           while d
+           if (-all-different? (list a b c d e f g h i j k l m n))
+           return (+ x 14)))
+
+(ert-deftest -test-part-1-examples ()
+  (should (equal (-part-1 "mjqjpqmgbljsphdztnvjfqwrcgsmlb") 7))
+  (should (equal (-part-1 "bvwbjplbgvbhsrlpgdmjqwftvncz") 5))
+  (should (equal (-part-1 "nppdvjthqldpwncqszvftbrmjlhg") 6))
+  (should (equal (-part-1 "nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg") 10))
+  (should (equal (-part-1 "zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw") 11)))
+
+(ert-deftest -test-part-1 ()
+  (should (equal (-part-1 (car (aoc-read-file-lines "input.txt"))) 1794)))
+
+(ert-deftest -test-part-2-examples ()
+  (should (equal (-part-2 "mjqjpqmgbljsphdztnvjfqwrcgsmlb") 19))
+  (should (equal (-part-2 "bvwbjplbgvbhsrlpgdmjqwftvncz") 23))
+  (should (equal (-part-2 "nppdvjthqldpwncqszvftbrmjlhg") 23))
+  (should (equal (-part-2 "nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg") 29))
+  (should (equal (-part-2 "zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw") 26)))
+
+(ert-deftest -test-part-2 ()
+  (should (equal (-part-2 (car (aoc-read-file-lines "input.txt"))) 2851)))
+
+(when noninteractive
+  (ert-run-tests-batch))
+
+;; Code
+
+;; Local Variables:
+;; read-symbol-shorthands: (("-" . "advent-of-code-day-6-") ("aoc-" . "advent-of-code-"))
+;; End:
diff --git a/input/day-6.txt b/input/day-6.txt
new file mode 100644
index 0000000..dfb0eb1
--- /dev/null
+++ b/input/day-6.txt
@@ -0,0 +1 @@
+bgdbdsbsbsttldddzzwnzzmpzmmzmqqcgglrglgbbbtmtddrssjtjqqtrtqtqppcvcddswdwbwlblfljfljlhhpchcfcgfcfwfllfccjlcjllbvbgglccznzrnzzvfzvffvzvccnwnnrtrqtttzmmndnqnvvlwvvgcclplccbggcscqscqcnndwdlwlvlffdssrzrtttbvvqttfdfrddhthbblnlmlmqmhhpvpcpwpccmdddbcbcgctggsstwwbcwwqllchlcccfwccvjcjhhvggnvvcssjwjhhdvdhdcdhdqhhwrwcrwcrrjzjccqhhvnnrppsqqplqqcvczzlpprlrqqvpvwwstwwzqqsnqqsrqrlqlggzztzhhvbbcncwnwhwbbqpbqpqdqsqjqrjrddpjpwwvlwlnwwmpwwnmmzgzqqdcdnnqllghhzwhwwggljjwswgwffsbffbggzfzcfzczpptrrnwrrcqqcwqqdttzqzjzqqltlggwlglgwgrgfgnffgqffnlntlnlccjwjfjnfjnffqvfqfcfsslwswfwvfwfvflfhhntngnhggqbbsggchghfggcmgmsggshsmmqffjpjnngwwftwffgqqvmqqslqslqqdzqzhzbhhdzhhllnzzlmzzltlwwsmswwtswtssvqsqhssfdsdtdjdqqqrffqjffrzrppjpgjjpgpmmzbbrcbbprbpbnpbpcpsspqqfggclcpczzngznzvzlvvcwvwcwdwcddhdbdwdhwhllpjllrmmhbmbgmgmpmhpmpqmpprggvsgvsvbsbbqbmmjdjfddsnnqpnnphppsbpsbpsprpjjqhhvrhvvdhdjhdhwdhhdjjrlrbbzhbbjljhllttrccbdbffznnfmnfnvfvrvbblmltlmmlbmmdqmqnmqqmmhchvcvpccnrccqhccshchshzshschcffpwwbdbqbbjhbhmbhmmzzzcscddbsbnnpzpfzzrfrlrmmzzhshbbtjtbtzbbddrwwhchvhtvvmhvmmwssqqzrzdrdqqntnjnrjrbbgqgzgbzgbzgbzgbbqtbbbqjjgvglvlzlqlbbjwjddjtjbjffcsfsnsnpspgpnnglnngrgqgbqgqtgtfggczzmbbvqqrssdqssgrssdzzvjvccbbgcgppgwwtmwwrnwnfwwnnzmzvvvmnnvdddrmrbrtbrbrvrqqcbbgjgfjfcfttgrrjmrmrttbnnsrnsnzsnzztmtgtjgjljdjtjrtrddtbtjbtjbtthhtmmllngnhgnnhthssgffljlnjllfvlvslvsvwvcvfccgqqtsqtqggbjbtjjtjvjtvtvddttqzqczzcvvdtvthvvfrfmrrclrlflbbhhcllfbbcwwgmwmnmpmgpptnpnjpnjjbqjqjddfdfjjpzzjnnvzzwtwpwfppzhphbbmsbmsbmbqqfpfsscttfrtrzzrznrrrbgbdbtdbdjjsmjmttlbtthbttrprpjppsbsjbjcbclchlhhlttntznnzfnfgnncsncnmmdndnlnclnndqnqssbsjbbrzrtzztszzvnznqqpnpbpnpvnpnhpphvpvfvhhrvhrrpttctjcjvcvzcvcscttqptpffscfsccqhchhdcdczcnzcncnhccfrrbprpbpqppdccjhjvjmjpjmpjjvfvrrwppgjgjjdgdmgdggcpccbrrgssbsjbsjsfscfcvvcrvcrcttbtffpqphpchclccwhcwcbwccbzzlvzvffbrbrbjbwjjqvgtcfnhtjvrcwbfjdbvgtqbvmbtscwzrwdfmwtjvswgrvncmftgmppvlcwjpnpffggrmvgtfqgqmhbhpslfwdfvfmbfndrmgfhdbbtdgvnslzpdfvdttqjpcnbzsjcvrprgrhpglwfwtdcbgdsjhnqjntjnsjcgwccjnvvngfpvqwvnclcsvhmwsrccvbjnnrjspwqdvjpfnfvbsslngzpdgjrcsnqfvdlsqdhdllcndshglztgrrjnptqfvllshmhbgdszvmvqdntpgzdvhstgrppwpdtdqvzsfgqfrgmmjqcsjhvrlmnjvfjghlvwbnqcggpqtrjztfzshnqpzznvlqcmnzvrwqlcbnbpwmljpvdzhbvbgtdjlzflsvzlcqdnsgzfjlccvjclqlzdhqzzrscttjmrvjvcqzvtzqlmsssnfcfmvcgmqjjwdnhtvlqrgdvlbbrffmrpnfsmwwwbnwclrgbfnzlbqvjfqjlfvfnfrhdqstddwnwrmsdnvzwfjfgpwcrfqqzbdwwtzprvqtgvtzbttlhcdczlhvlgrbptztswftvnjmgrnbwpfwnztvqmqbznvnllgjmqrwprvwtnptlbfwbblzsblptwpdwgcvwsbmbrtqfvjsbzfvsfvpwfwbnnfcsddhsnwnvvqthjdgvzgjprtqmvhdqjqhgqppqqcpzfcwzcmrslftgrvbvdsdgfzfmvvcqzcszfwdvghdnlwwpddzdsqsdqvvrwhphbqvcbjbtnqgnqqdsqcmrllhmdvpffnqmrgfddjbrjwflshzswvjtmqgqmzvcnlctvdpjhzzlgpzgprjncrscnlmdhvdqpfllsqgstmssvlzmrtjmgwppfqjsrfmlnszdnhngzhtbbnsnvmtzpfsdcsvsvvjnfnzhrzmvlhrbslrsbgwwcvrzpgcnmjqnvgmzmlvpccrmggtzzhsdtbbcdnpdlnbztgjhttmqdhjphcrbgjtctqmgbfmflgqztztcjqvgsscrmwfbvnrnbgbjgqmwdzhwwnddwgrprhvlgftcbnwjqmcgczpbhfqcqzdbdwhmzfmgvcjdsfzdbrzjjvfrvftdblnlhpbqvdprnsjdpznbbgqpgnnjmcnsbszfwblthtwlwrdphjltclmqnbpcgngdnfpltttsrvdmhrcvlqfplqmqvslwgcbrwrmchscczrfgspwjtdqtlbddbsclrlbmhdzqdrgjfsgldfjmgcglbgjhmghntndqcbgqwmdvczbwgcctzvcrsqqctwwddfhhfhwlsrsljpnrlqtbdzprjbfrjgztwbpnfqnlftzcgrpmpcnljhscfbsqzbsgwqcgbvctnhswhrsmwjgcccdsnbscwllmpstpnrccjspnjqmtgcsgbjzpfvzjrhlvnfblqmcmgcrvnpchwhlsqsbhzhsgdvwmdcwphwccvzmmqqjrvqwphbnmddzcmggmbsqrhbcqmdlgvccbhhmhwdjhhhcwnffthmgfhpltqbhnvdqfrzjdvlppqhzfdgbzbrtfllsbvjjcgbwsbcmfrbjtvzqsntzdzprnpmfpfpgmfprlbcdqbdzjsfjbtczdpdnhlwdhmwsjtvmztbhdbbdgvrtbqsqbsnwjjhlslzcblrwlfpzqlvdvmgqhrpjmbjbntmjsjvgsmdsnctlgtnlqgfvhwqbjbrczpfzmzwgvrphfmnnhrlzwzgthzqnzzmptppzdszlcpjjvbpjbtjfrqtbnpnwsdglbbjftvngcghjlnsqwspmmfdpslsmqtpngbtvvrvbqqdsphfhvsnmhprfclnjmfrtqnlqcbmfrggbstwdbwsvtpvflvfgqltmqjpnfclbwtlwhmqrmzcrbztstgpjrdsnwpqrcnvvnnnszlrtpqjtsnbjrdcthrzrtccgcvnnlzfjlcdnzzqclvtncjbznrlpnzhvcwmrfrzpcldfmfzfpchlmddgvcfdqdhzzdtwhsfcvsthtmqgvhzdpjcgwsmrvwsnqmhdnfqdrrnmjwcpjjftfdhvwrwwtvptzfrmgffdcrhvcmccfqctswzzmlsjvdjzgjgndhmmrwvwmmtrnpgsnmtcqdbdpqjmcddcrbcfmmccnvsfhwtvfhsjfmlfttspfghpfggrffnrwjggqwggrmpzscprvdzmzhwjjcsmpsltzwgchttwpngrlptprqnjzzpbpbcvrclggtqwlcwdpjpnjrhtgqwsvhsswwqtlnglnqnvffrgmlbzthvnhrzvsvclgdmmjzrpfv
\ No newline at end of file