reference same names in Danny's list to keep example consistent between Parts 2 & 4

Author: Rise Riyo

part-4.ipynb

@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:c861c23991927808e3d10e1c2a012292dad1efcb0d56cb89e7bdb37f2770e0d4"
+  "signature": "sha256:4472f9a0913d336511c37c245ad87a8dedf00fa956f17068863f1ade09aee044"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -141,7 +141,7 @@
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "names = [\"Alice\", \"Bob\", \"Cassie\", \"Diane\", \"Ellen\"]"
+      "names = [Danny\", \"Audrey\", \"Rise\", \"Alain\"]"
      ],
      "language": "python",
      "metadata": {},