#!/usr/bin/python
  import re
  ifile = open('copy.txt','r')
  ofile = open('third','w')
  lines = ifile.readlines()
  new_var = ''
  for line in lines:
  	vertex_m = re.search('(vertex\s.*?\sname=)\"([a-z]+)\"',line)
  	edge_m = re.search('(edge\s.*\s.*\sweight=)(\S*)',line)
  	if vertex_m:
  		new_var = vertex_m.group(1) + '"a' + vertex_m.group(2) + '"'
  	elif edge_m:
  		new_var = edge_m.group(1) + '1' + edge_m.group(2)
  		
  	ofile.write(new_var+'
  ')
  
  ifile.close()
  ofile.close()