code: def regions_to_bits_rep(selected_regions, all_regions_mapping):
      result = 0
      for region in selected_regions:
          idx = all_regions_mapping[region]
          assert idx < 64, str(all_regions_mapping)
          result |= 1 << (idx - 1)
      return result
  
imports: import json
  import logging
  from collections import deque
  from functools import wraps
  from typing import Any, Deque, Dict, List, Optional, Set, Tuple, overload
  from aiohttp import web
  from gear import Database, maybe_parse_bearer_header
  from hailtop.utils import secret_alnum_string
label_desc: Use image node_id 5 for calling a global function with example usage: regions_to_bits_rep(selected_regions, all_regions_mapping) and returns: result