    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "## Problem: Remove duplicates from a linked list\n",
      "\n",
      "* [Constraints](#Constraints)\n",
      "* [Test Cases](#Test-Cases)\n",
      "* [Algorithm](#Algorithm)\n",
      "* [Code](#Code)\n",
 
</s> remove     "## Problem: Remove duplicates from a linked list\n",
 </s> add     "## Problem: Remove duplicates from a linked list.\n", </s> remove     "## Problem: Find the kth to last element of a linked list\n",
 </s> add     "## Problem: Find the kth to last element of a linked list.\n", </s> remove     "## Problem: Find the kth to last element of a linked list\n",
 </s> add     "## Problem: Find the kth to last element of a linked list.\n", </s> remove     "## Problem: Implement a linked list with insert, append, find, delete, length, and print methods\n",
 </s> add     "## Problem: Implement a linked list with insert, append, find, delete, length, and print methods.\n", </s> remove     "## Problem: Implement a linked list with insert, append, find, delete, length, and print methods\n",
 </s> add     "## Problem: Implement a linked list with insert, append, find, delete, length, and print methods.\n",
    "## Problem: Remove duplicates from a linked list.\n",
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
    "## Problem: Remove duplicates from a linked list.\n",
      "\n",
      "* [Constraints](#Constraints)\n",
      "* [Test Cases](#Test-Cases)\n",
      "* [Algorithm](#Algorithm)\n",
      "* [Code](#Code)\n",
keep keep keep keep replace keep keep keep keep keep
 Fix challenge titles punctuation (#132) 
linked_lists/remove_duplicates/remove_duplicates_challenge.ipynb