(Statements
{+(Subscript
  {+(Identifier)+}
  {+(Enumeration
    {+(Integer)+}
    {+(Integer)+}
    {+(Empty)+})+}
  {+(Ellipsis)+})+}
  (Subscript
    (Identifier)
    (Enumeration
      (Empty)
      (Empty)
      (Empty)))
  (Subscript
  { (Identifier)
  ->(Identifier) }
    (Enumeration
    { (Integer)
    ->(Integer) }
      (Empty)
      (Empty)))
{+(Subscript
  {+(Identifier)+}
  {+(Enumeration
    {+(Empty)+}
    {+(Empty)+}
    {+(Empty)+})+})+}
{-(Subscript
  {-(Identifier)-}
  {-(Enumeration
    {-(Integer)-}
    {-(Integer)-}
    {-(Empty)-})-}
  {-(Ellipsis)-})-}
{-(Subscript
  {-(Identifier)-}
  {-(Enumeration
    {-(Empty)-}
    {-(Empty)-}
    {-(Empty)-})-})-})