diff --git a/Appendix A/auto_coloring.ipynb b/Appendix A/auto_coloring.ipynb
index 74836a7..eaca93e 100644
--- a/Appendix A/auto_coloring.ipynb	
+++ b/Appendix A/auto_coloring.ipynb	
@@ -36,7 +36,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "_, contours, _ = cv2.findContours(gray_image, cv2.RETR_TREE,\n",
+    "contours, _ = cv2.findContours(gray_image, cv2.RETR_TREE,\n",
     "                                  cv2.CHAIN_APPROX_SIMPLE)\n",
     "for i,cnt in enumerate(contours):\n",
     "    gray_image = cv2.drawContours(gray_image, [cnt], 0, i+1, cv2.FILLED)\n",