text: s = ''
  for i in range(ord('a'), ord('z')):
  	s += chr(i)
  for i in range(ord('A'), ord('Z')):
  	s += chr(i)
  for i in range(0, 10):
  	s += str(i)
  
  with open('test.txt', 'w') as fw:
  	for i in range(2000):
  		fw.write(str(i+1))
  		fw.write(s)
  		fw.write('\n')
  