code: def has_missing_break(real_seg, pred_seg):
      
      for symbol_pred in pred_seg:
          for symbol_real in real_seg:
              if symbol_pred[0] in symbol_real:
                  for stroke in symbol_pred:
                      if stroke not in symbol_real:
                          return True
      return False
docs: Parameters
      ----------
      real_seg : list of integers
          The segmentation as it should be.
      pred_seg : list of integers
          The predicted segmentation.
  
      Returns
      -------
      bool :
          True, if strokes of two different symbols are put in the same symbol.