diff --git a/ipynb/xkcd-Name-Dominoes.ipynb b/ipynb/xkcd-Name-Dominoes.ipynb
index 70e5b18..15790aa 100644
--- a/ipynb/xkcd-Name-Dominoes.ipynb
+++ b/ipynb/xkcd-Name-Dominoes.ipynb
@@ -468,7 +468,7 @@
     "\n",
     "I'm happy with the results, but here are some ideas for improvements, if you want something to work on:\n",
     "- Allow tiles that are 1 or 3 squares wide, like `('PRINCE',)` or `('FRANK', 'LLOYD', 'WRIGHT')`.\n",
-    "- Print names horizontally in tiles that are placed horizontally, and upside down for tiles that are placed vertically, but with the first name on the right.\n"
+    "- Print names vertically in tiles that are placed vertically, and upside down for tiles that are placed horizontally, but with the first name on the right.\n"
    ]
   }
  ],