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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def adaptive_universal_transformer_multilayer_tpu():
 """Multi-layer config for adaptive Transformer on TPU."""

  hparams = adaptive_universal_transformer_base_tpu()
  hparams.num_inrecurrence_layers = 2
  hparams.mix_with_transformer = "before_ut,after_ut"
  hparams.num_mixedin_layers = 1
  hparams.transformer_ffn_type = "sepconv"
  # TODO(lukaszkaiser): the options below don't work on TPU yet, make them work.
  # hparams.add_step_timing_signal = True
  # hparams.add_sru = True
  # hparams.self_attention_type = "dot_product_relative_v2"
  # hparams.max_relative_position = 256
  return hparams