diff --git a/module3.ipynb b/module3.ipynb
index 24b3064..1c962b2 100644
--- a/module3.ipynb
+++ b/module3.ipynb
@@ -16,7 +16,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [
     {
@@ -29,7 +29,21 @@
       "<re.Match object; span=(0, 1), match='x'>\n",
       "<re.Match object; span=(4, 8), match='ping'>\n",
       "<re.Match object; span=(1, 5), match='pong'>\n",
-      "<re.Match object; span=(0, 4), match='Pang'>\n"
+      "<re.Match object; span=(0, 4), match='Pang'>\n",
+      "<re.Match object; span=(0, 6), match='Python'>\n",
+      "<re.Match object; span=(18, 22), match='hway'>\n",
+      "None\n",
+      "<re.Match object; span=(0, 6), match='cloudy'>\n",
+      "<re.Match object; span=(0, 6), match='cloud9'>\n",
+      "<re.Match object; span=(4, 5), match=' '>\n",
+      "<re.Match object; span=(30, 31), match='.'>\n",
+      "<re.Match object; span=(7, 10), match='cat'>\n",
+      "<re.Match object; span=(7, 10), match='dog'>\n",
+      "<re.Match object; span=(12, 15), match='dog'>\n",
+      "<re.Match object; span=(7, 10), match='cat'>\n",
+      "<re.Match object; span=(7, 10), match='dog'>\n",
+      "<re.Match object; span=(12, 15), match='dog'>\n",
+      "['dog', 'cat']\n"
      ]
     }
    ],
@@ -43,7 +57,62 @@
     "print(re.search(r\"^x\", \"xenon\"))\n",
     "print(re.search(r\"p.ng\", \"clapping\"))\n",
     "print(re.search(r\"p.ng\", \"sponge\"))\n",
-    "print(re.search(r\"p.ng\", \"Pangaea\", re.IGNORECASE))"
+    "print(re.search(r\"p.ng\", \"Pangaea\", re.IGNORECASE))\n",
+    "print(re.search(r\"[Pp]ython\", \"Python\"))\n",
+    "print(re.search(r\"[a-z]way\", \"The end of the highway\"))\n",
+    "print(re.search(r\"[a-z]way\", \"What a way to go\"))\n",
+    "print(re.search(\"cloud[a-zA-Z0-9]\", \"cloudy\"))\n",
+    "print(re.search(\"cloud[a-zA-Z0-9]\", \"cloud9\"))\n",
+    "print(re.search(r\"[^a-zA-Z]\", \"This is a sentence with spaces.\"))\n",
+    "print(re.search(r\"[^a-zA-Z ]\", \"This is a sentence with spaces.\"))\n",
+    "print(re.search(r\"cat|dog\", \"I like cats.\"))\n",
+    "print(re.search(r\"cat|dog\", \"I love dogs!\"))\n",
+    "print(re.search(r\"cat|dog\", \"I like both dogs and cats.\"))\n",
+    "print(re.search(r\"cat|dog\", \"I like cats.\"))\n",
+    "print(re.search(r\"cat|dog\", \"I love dogs!\"))\n",
+    "print(re.search(r\"cat|dog\", \"I like both dogs and cats.\"))\n",
+    "print(re.findall(r\"cat|dog\", \"I like both dogs and cats.\"))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "True\n",
+      "False\n",
+      "True\n",
+      "True\n",
+      "False\n",
+      "True\n",
+      "True\n",
+      "False\n"
+     ]
+    }
+   ],
+   "source": [
+    "import re\n",
+    "def check_aei (text):\n",
+    "  result = re.search(r\"a.e.i\", text)\n",
+    "  return result != None\n",
+    "\n",
+    "print(check_aei(\"academia\")) # True\n",
+    "print(check_aei(\"aerial\")) # False\n",
+    "print(check_aei(\"paramedic\")) # True\n",
+    "\n",
+    "def check_punctuation (text):\n",
+    "  result = re.search(r\"[,.:;?!]\", text)\n",
+    "  return result != None\n",
+    "\n",
+    "print(check_punctuation(\"This is a sentence that ends with a period.\")) # True\n",
+    "print(check_punctuation(\"This is a sentence fragment without a period\")) # False\n",
+    "print(check_punctuation(\"Aren't regular expressions awesome?\")) # True\n",
+    "print(check_punctuation(\"Wow! We're really picking up some steam now!\")) # True\n",
+    "print(check_punctuation(\"End of the line\")) # False"
    ]
   },
   {