def load_input_data(input_path, do_lowercase):
  """Load input data."""
  examples = []
  lc = 0
  with open(input_path, "r") as f:
    for line in f:
      lc += 1
      line_split = line.strip().split("\t")
      print(line_split)
      if len(line_split) != 2:
        raise Exception("Each line is expect to only have two columns.")
      source, target = line_split

      if do_lowercase:
        source, target = source.lower(), target.lower()
      examples.append((source, target))

  print("Number of examples processed: %d" % lc)
  return examples