input: 
  def add_marks(marks: list, mark: int) -> list:
      """ Adds a given mark to each value in the marks list.
      >>> add_marks([87, 56, 99, 54], 4)
      [91, 60, 103, 58]
      >>> add_marks([22, 33, 44], 5)
      [27, 38, 49]
      """
      return [m + mark for m in marks]
  
output:     return [m + mark for m in marks]