diff --git a/lists.ipynb b/lists.ipynb
index 38de076..0c24e7d 100644
--- a/lists.ipynb
+++ b/lists.ipynb
@@ -20,7 +20,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -36,7 +36,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [
     {
@@ -60,7 +60,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -77,7 +77,7 @@
        " 'Pindar']"
       ]
      },
-     "execution_count": 3,
+     "execution_count": 4,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -119,7 +119,8 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "What is the `type` of `lyric_poets[0]`?"
+    "What is the `type` of `lyric_poets[0]`?\n",
+    "str"
    ]
   },
   {
@@ -1019,6 +1020,137 @@
     "\n",
     "Complete Exercise 3-8 in Matthes (2023, p. 45)."
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['Paris', 'Beijing', 'Lima', 'Auckland', 'Nouakchott']\n"
+     ]
+    }
+   ],
+   "source": [
+    "interesting_places = [\"Paris\", \"Beijing\", \"Lima\", \"Auckland\", \"Nouakchott\"]\n",
+    "print (interesting_places)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['Auckland', 'Beijing', 'Lima', 'Nouakchott', 'Paris']\n",
+      "['Paris', 'Beijing', 'Lima', 'Auckland', 'Nouakchott']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(sorted(interesting_places))\n",
+    "print(interesting_places)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['Paris', 'Nouakchott', 'Lima', 'Beijing', 'Auckland']\n",
+      "['Paris', 'Beijing', 'Lima', 'Auckland', 'Nouakchott']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(sorted(interesting_places, reverse=True))\n",
+    "print(interesting_places)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "None\n",
+      "['Nouakchott', 'Auckland', 'Lima', 'Beijing', 'Paris']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(interesting_places.reverse())\n",
+    "print(interesting_places)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "None\n",
+      "['Paris', 'Beijing', 'Lima', 'Auckland', 'Nouakchott']\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(interesting_places.reverse())\n",
+    "print(interesting_places)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 20,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "None\n",
+      "['Auckland', 'Beijing', 'Lima', 'Nouakchott', 'Paris']\n"
+     ]
+    }
+   ],
+   "source": [
+    "interesting_places.sort()\n",
+    "print(interesting_places)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 21,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "['Paris', 'Nouakchott', 'Lima', 'Beijing', 'Auckland']\n"
+     ]
+    }
+   ],
+   "source": [
+    "interesting_places.sort(reverse=True)\n",
+    "print(interesting_places)"
+   ]
   }
  ],
  "metadata": {