diff --git a/arrays_strings/permutation/permutation_solution.ipynb b/arrays_strings/permutation/permutation_solution.ipynb
index 0b1bd0c..4bc8726 100644
--- a/arrays_strings/permutation/permutation_solution.ipynb
+++ b/arrays_strings/permutation/permutation_solution.ipynb
@@ -140,18 +140,15 @@
     "from collections import defaultdict\n",
     "\n",
     "\n",
-    "def unique_counts(string):\n",
-    "    dict_chars = defaultdict(int)\n",
-    "    for char in string:\n",
-    "        dict_chars[char] += 1\n",
-    "    return dict_chars\n",
-    "\n",
-    "\n",
     "def permutations_alt(str1, str2):\n",
     "    if len(str1) != len(str2):\n",
     "        return False\n",
-    "    unique_counts1 = unique_counts(str1)\n",
-    "    unique_counts2 = unique_counts(str2)\n",
+    "    unique_counts2 = defaultdict(int)\n",
+    "    unique_counts2 = defaultdict(int)\n",
+    "    for char in str1:\n",
+    "        unique_counts2[char] += 1\n",
+    "    for char in str2:\n",
+    "        unique_counts2[char] += 1\n",
     "    return unique_counts1 == unique_counts2"
    ]
   },
@@ -218,7 +215,6 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Success: test_permutation\n",
       "Success: test_permutation\n"
      ]
     }
@@ -230,21 +226,21 @@
  ],
  "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,