<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _register_babi_problems():
 """It dynamically instantiates a class for each babi subsets-tasks. @registry.register_problem class BabiQaConcatAllTasks_10k(EditSequenceRegexProblem):
 @property def babi_task_id(self):
 return "qa0" @property def babi_subset(self):
 return "en-10k" It does not put the classes into the global namespace, so to access the class we rely on the registry or this module"s REGISTERED_PROBLEMS list. It will be available as registry.problem("babi_qa_concat_all_tasks_10k") i.e., change camel case to snake case. Numbers are considered lower case characters for these purposes. """

  for (subset, subset_suffix) in [("en", "_1k"), ("en-10k", "_10k")]:
    for problem_name, babi_task_id in six.iteritems(_problems_to_register()):
      problem_class = type("BabiQaConcat" + problem_name + subset_suffix,
                           (BabiQaConcat,), {
                               "babi_task_id": babi_task_id,
                               "babi_subset": subset
                           })
      registry.register_problem(problem_class)
      REGISTERED_PROBLEMS.append(problem_class.name)