new_contents: #!/usr/bin/env python3
  
  """Reduces an ngrams file for training nplm to a smaller version of it with less ngrams"""
  from sys import argv
  
  if len(argv) != 5:
      print("Wrong number of args, got: " + str(len(argv) - 1) + " expected 4.")
      print("Usage: reduce_ngrams.py INFILE OUTFILE START_IDX NGRAMS")
      exit()
  
  INFILE = open(argv[1], 'r')
  OUTFILE = open(argv[2], 'w')
  START_IDX = int(argv[3])
  NGRAMS = int(argv[4])
  
  for line in INFILE:
      line = line.split()
      line = line[START_IDX:START_IDX+NGRAMS]
      linetowrite = ""
      for token in line:
          linetowrite = linetowrite + token + " "
      #Strip final empty space and add newline
      linetowrite = linetowrite[:-1]
      linetowrite = linetowrite + '\n'
      OUTFILE.write(linetowrite)
  
  INFILE.close()
  OUTFILE.close()
  
subject: Add option to reduce the ngrams from already prepared .ngrams file to train a model with smaller number of ngrams