     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
     "pygments_lexer": "ipython3",
     "version": "3.5.0"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
 
</s> remove   },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
 </s> add  </s> remove    "execution_count": 4,
 </s> add    "execution_count": 1, </s> remove    "execution_count": 7,
 </s> add    "execution_count": 3, </s> remove    "execution_count": 5,
 </s> add    "execution_count": 2, </s> remove     "<small><i>This notebook was prepared by [Donne Martin](http://donnemartin.com). Source and license info is on [GitHub](https://github.com/donnemartin/interactive-coding-challenges).</i></small>"
 </s> add     "<small><i>This notebook was prepared by [hashhar](https://github.com/hashhar). Source and license info is on [GitHub](https://github.com/donnemartin/interactive-coding-challenges).</i></small>"
   "version": "3.4.3"
     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
     "pygments_lexer": "ipython3",
   "version": "3.4.3"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
keep keep keep keep replace keep keep keep keep keep
 Update author to hashhar's challenge. 
arrays_strings/better_compress/better_compress_solution.ipynb