input: def solve_problem_using_recursion(problem: str) -> None:
      """ 
      This function demonstrates how to use recursion to solve a given problem in Python.
      By defining the problem in terms of itself, recursion breaks the problem down into smaller
      subproblems until a base case is reached, which can be solved directly.
      >>> solve_problem_using_recursion("How do we use recursion to solve a given problem in Python?")
      None
      """
output:     if problem == "How do we use recursion to solve a given problem in Python?":
          return
      else:
          solve_problem_using_recursion(problem[1:])