code: def generate_aliases(spec: str) -> Tuple[str, List[str]]:
      """
      Take the given string and split it by spaces. For each word, split it by
      pipe characters and compute the result of joining each prefix of that
      list. Return a big list containing all the results, except that the result
      of joining the whole first word is pulled out.
  
      "c|heck|out co"
      => ["c|heck|out", "co"]
      => [["c", "heck", "out"], ["co"]]
      => [["c", "check", "checkout"], ["co"]]
      => "checkout", ["c", "check", "co"]
      """
      prefixes = [make_prefixes(s) for s in spec.split()]
      main = prefixes[0].pop()
      return main, list(itertools.chain.from_iterable(prefixes))
  
imports: import functools
  import itertools
  from argparse import SUPPRESS, ArgumentDefaultsHelpFormatter, ArgumentParser, Namespace
  from typing import Any, Callable, List, NamedTuple, Optional, Tuple, Union, cast
  from termcolor import colored
  from determined.common import util
label_desc: Use image node_id 2 for calling a global function with example usage: generate_aliases(spec) and returns: main,  list