new_contents: #!/usr/bin/env python
  
  import numpy as np
  import sys
  import re
  
  fin = open("genes.hg19.out", 'r')
  fout = open("genes.hg19.exons.temp", 'w')
  
  line=fin.readline()
  
  for line in fin:
    fields = line.strip().split()
    chr = fields[2]
    strand = fields[3]
    gene = fields[1]
    exon_start = fields[9].split(',')[:-1]
    exon_end = fields[10].split(',')[:-1]
    cnt = len(exon_start)
    
    for i in range(cnt):
      fout.write(chr + '\t' + exon_start[i] + '\t' + exon_end[i] + '\t' + gene + '\t' + fields[12] + '\t' + strand + '\n')
  
subject: add aux script