diff --git a/.DS_Store b/.DS_Store
index 6734587..c36de7a 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/notebooks/mushroom_analysis.ipynb b/notebooks/mushroom_analysis.ipynb
index 6149e3a..93ea58c 100644
--- a/notebooks/mushroom_analysis.ipynb
+++ b/notebooks/mushroom_analysis.ipynb
@@ -287,6 +287,17 @@
     "print(\"Rows with missing cells:\", X.isna().any(axis=1).sum())\n",
     "print(X[\"stalk_root\"].value_counts(dropna=False))"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a3459b1e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "a = \"hello\"\n",
+    "print(a)"
+   ]
   }
  ],
  "metadata": {