(Program
{+(Begin
    (Identifier)
    (Rescue
      (Constant)
      (Rescue
        (Constant)
        (Constant)
        (RescuedException
          (Identifier))
        (Identifier)))
    (Else
      (Identifier))
    (Ensure
      (Identifier)))+}
{+(Method
    (Identifier)
    (Rescue
      (Constant)
      (Rescue
        (Constant)
        (Constant)
        (RescuedException
          (Identifier))))
    (Else)
    (Ensure))+}
{+(Modifier Rescue
    (Identifier)
    (Identifier))+}
{-(Begin
    (Identifier)
    (Rescue
      (Identifier)
      (Identifier)))-})