      "    * Yes\n",
      "* Do you expect the function to return a new list?\n",
      "    * Yes"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
 
</s> remove     "## Clarifying Questions\n",
 </s> add     "## Constraints and Assumptions\n",
    "\n",
    "*Problem statements are often intentionally ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n", </s> remove     "* Test error cases\n",
 </s> add  </s> remove     "* X invalid\n",
 </s> add  </s> remove     "* [Code](#Code)"
 </s> add     "* [Code](#Code)\n",
    "* [Unit Test](#Unit-Test)"
    "    * Yes\n",
    "* Can we assume the input x is valid?\n",
    "    * Yes\n",
    "* Can we assume we already have a linked list class that can be used for this problem?\n",
      "    * Yes\n",
      "* Do you expect the function to return a new list?\n",
    "    * Yes\n",
    "* Can we assume the input x is valid?\n",
    "    * Yes\n",
    "* Can we assume we already have a linked list class that can be used for this problem?\n",
      "    * Yes"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
keep add keep keep keep keep keep keep
 Reworked notebook: Added more detail to constraints and test cases.  Reworked code and unit test. 
linked-lists/partition.ipynb