diff --git a/arrays_strings/compress/compress_challenge.ipynb b/arrays_strings/compress/compress_challenge.ipynb
index fb17544..72d022b 100644
--- a/arrays_strings/compress/compress_challenge.ipynb
+++ b/arrays_strings/compress/compress_challenge.ipynb
@@ -18,7 +18,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Problem: Compress a string such that 'AAABCCDDDD' becomes 'A3B1C2D4'.  Only compress the string if it saves space.\n",
+    "## Problem: Compress a string such that 'AAABCCDDDD' becomes 'A3BC2D4'.  Only compress the string if it saves space.\n",
     "\n",
     "* [Constraints](#Constraints)\n",
     "* [Test Cases](#Test-Cases)\n",
@@ -52,7 +52,7 @@
     "* None -> None\n",
     "* '' -> ''\n",
     "* 'AABBCC' -> 'AABBCC'\n",
-    "* 'AAABCCDDDD' -> 'A3B1C2D4'"
+    "* 'AAABCCDDDD' -> 'A3BC2D4'"
    ]
   },
   {
@@ -118,7 +118,7 @@
     "        assert_equal(func(None), None)\n",
     "        assert_equal(func(''), '')\n",
     "        assert_equal(func('AABBCC'), 'AABBCC')\n",
-    "        assert_equal(func('AAABCCDDDD'), 'A3B1C2D4')\n",
+    "        assert_equal(func('AAABCCDDDD'), 'A3BC2D4')\n",
     "        print('Success: test_compress')\n",
     "\n",
     "\n",
@@ -143,21 +143,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.4.3"
   }
  },
  "nbformat": 4,