      "    * Note: Unicode strings could require special handling depending on your language\n",
      "* Can you use additional data structures?  \n",
      "    * Yes\n",
      "* Is this case sensitive?\n",
      "    * Yes\n",
      "* Do you compress even if it doesn't save space?\n",
      "    * No"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
 
</s>
    "    * Yes"
      "    * Note: Unicode strings could require special handling depending on your language\n",
      "* Can you use additional data structures?  \n",
      "    * Yes\n",
      "* Is this case sensitive?\n",
    "    * Yes"
    "    * Yes"
    "    * Yes"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
keep keep keep keep replace replace replace keep keep keep keep keep
 Tweaked compress challenge to make it more explicit that you should only compress a string if it saves space.  Fixes #2.
arrays_strings/compress/compress_solution.ipynb