code: def rearrange_pads(pads):
      
      half = len(pads)//2
      starts = pads[:half]
      ends = pads[half:]
      return [j for i in zip(starts, ends) for j in i]
docs: Interleave pad values to match NNabla format
      (S0,S1,E0,E1) => (S0,E0,S1,E1)