diff --git a/online_judges/ransom_note/ransom_note_solution.ipynb b/online_judges/ransom_note/ransom_note_solution.ipynb
index 345e0a0..258e59b 100644
--- a/online_judges/ransom_note/ransom_note_solution.ipynb
+++ b/online_judges/ransom_note/ransom_note_solution.ipynb
@@ -88,24 +88,22 @@
    },
    "outputs": [],
    "source": [
+    "from collections import Counter\n",
+    "\n",
+    "\n",
     "class Solution(object):\n",
     "\n",
     "    def match_note_to_magazine(self, ransom_note, magazine):\n",
-    "        if ransom_note is None or magazine is None:\n",
-    "            raise TypeError('ransom_note or magazine cannot be None')\n",
-    "        seen_chars = {}\n",
-    "        for char in magazine:\n",
-    "            if char in seen_chars:\n",
-    "                seen_chars[char] += 1\n",
-    "            else:\n",
-    "                seen_chars[char] = 1\n",
-    "        for char in ransom_note:\n",
-    "            try:\n",
-    "                seen_chars[char] -= 1\n",
-    "            except KeyError:\n",
-    "                return False\n",
-    "            if seen_chars[char] < 0:\n",
+    "        if not isinstance(ransom_note, str) or not isinstance(magazine, str):\n",
+    "            raise TypeError('Invalid arguments provided.')\n",
+    "        \n",
+    "        characters_in_magazine = Counter(magazine)\n",
+    "        characters_in_note = Counter(ransom_note)\n",
+    "        \n",
+    "        for character, count in characters_in_note.items():\n",
+    "            if count > characters_in_magazine.get(character, 0):\n",
     "                return False\n",
+    "            \n",
     "        return True"
    ]
   },