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diff --git a/aoc2022/day-06/day-06.ipynb b/aoc2022/day-06/day-06.ipynb
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-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "### Advent of Code 2022\n",
-    "#### Day 6: Tuning Trouble\n",
-    "\n",
-    "You're parsing a buffer of characters, looking for a \"marker\": the index of the first character where the previous $n$ characters are all unique.\n",
-    "\n",
-    "**Part 1.** What if $n = 4$, for the \"start of packet\" marker?\n",
-    "\n",
-    "**Part 2.** What if $n = 14$, for the \"start of message\" marker?"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "(require racket\n",
-    "         advent-of-code\n",
-    "         (only-in algorithms sliding))\n"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "##### Parts 1 and 2\n",
-    "\n",
-    "`(sliding xs n)` returns all the overlapping sublists of `xs` that are `n` elements wide.  This turns this problem into a simple `for` comprehension, just looking for the first sublist with no duplicates (which means its length after deduplication doesn't change).\n",
-    "\n",
-    "The solution to part 1 and part 2 is the same, just differing in how wide the window is."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 2,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/html": [
-       "<code>1042</code>"
-      ],
-      "text/plain": [
-       "1042"
-      ]
-     },
-     "execution_count": 2,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "(define buffer (fetch-aoc-input (find-session) 2022 6))\n",
-    "\n",
-    "(define (find-marker data type)\n",
-    "  (define n\n",
-    "    (match type\n",
-    "      ['start-of-packet 4]\n",
-    "      ['start-of-message 14]))\n",
-    "  (for/first ([chunk (in-list (sliding (string->list data) n))]\n",
-    "              [i (in-naturals n)]\n",
-    "              #:when (= n (~> chunk remove-duplicates length)))\n",
-    "    i))\n",
-    "\n",
-    "(find-marker buffer 'start-of-packet)\n",
-    "\n"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/html": [
-       "<code>2980</code>"
-      ],
-      "text/plain": [
-       "2980"
-      ]
-     },
-     "execution_count": 3,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "(find-marker buffer 'start-of-message)"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Racket (trusted)",
-   "language": "racket",
-   "name": "racket-trusted"
-  },
-  "language_info": {
-   "codemirror_mode": "scheme",
-   "file_extension": ".rkt",
-   "mimetype": "text/x-racket",
-   "name": "racket",
-   "pygments_lexer": "racket",
-   "version": "8.7"
-  },
-  "orig_nbformat": 4,
-  "vscode": {
-   "interpreter": {
-    "hash": "916dbcbb3f70747c44a77c7bcd40155683ae19c65e1c03b4aa3499c5328201f1"
-   }
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 2
-}