def boolInput(question, error='Skriv in J eller N\n', yesNoLetters=('j', 'n')):
  """
  Asks the user a yes/no question and returns a bool based on the input.

  Parameters: \\
    prompt (str): The prompt asking the user for input \\
    error? (str): The message to be printed on parsing error \\
    yesNoLetters? ((str,str)): The letters to be used for representing yes and no in low caps
  """
  yesLetters = [yesNoLetters[0], yesNoLetters[0].capitalize()]
  noLetters = [yesNoLetters[1], yesNoLetters[1].capitalize()]
  while True:
    try:
      choice = input(question)
      assert choice in yesLetters + noLetters
      return choice in yesLetters
    except AssertionError:
      print(error)