     "version": "2.7.6"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
 
</s>
 "nbformat_minor": 1
     "version": "2.7.6"
    }
   },
   "nbformat": 4,
 "nbformat_minor": 1
  }
keep keep keep keep replace keep
 #273: Remove nose dependency for staging/ (#283)
staging/sorting_searching/group_ordered/group_ordered_challenge.ipynb