text: import os
  import numpy as np
  
  gridFiles    = np.array(os.popen(f'alien.py find 4Prongs2015o AnalysisResults.root').readlines())
  localFiles   =  np.array(os.popen('find . -name *.root'))
  
  diff = np.setdiff1d(gridFiles, localFiles)
  
  
  