new_contents: import os
  
  INPUT_LENGTH = 512 #1033 - longest training input for redial
  TARGET_LENGTH = 128 #159 - longest trainin target for redial
  BASE_DIR = "gs://e2e_central"
  DATA_DIR = os.path.join(BASE_DIR, "data")
  MODELS_DIR = os.path.join(BASE_DIR, "models")
  BASE_PRETRAINED_DIR = "gs://t5-data/pretrained_models"
  RD_JSONL_DIR = "gs://e2e_central/data/redial/"
  RD_SPLIT_FNAMES = {
      "train": "rd-train-formatted.jsonl",
      "validation": "rd-test-formatted.jsonl"
  }
  rd_counts_path = os.path.join(DATA_DIR, "rd-counts.json")
  rd_tsv_path = {
      "train": os.path.join(DATA_DIR, "rd-train.tsv"),
      "validation": os.path.join(DATA_DIR, "rd-validation.tsv")
  }
  
subject: create constants file