def METHOD_NAME(exogenous_feature_columns):
  input_window_size = 8
  output_window_size = 2
  return (
      tf.contrib.timeseries.ARRegressor(
          periodicities=12,
          num_features=1,
          input_window_size=input_window_size,
          output_window_size=output_window_size,
          exogenous_feature_columns=exogenous_feature_columns),
      64, input_window_size + output_window_size)