(Statements
  (Match
    (Send
      (Identifier))
    (Statements
    {+(Pattern
      {+(Statements
        {+(Send
          {+(Identifier)+})+})+}
      {+(Statements
        {+(Send
          {+(Identifier)+})+})+})+}
      (Pattern
        (Statements
          (Send
          { (Identifier)
          ->(Identifier) }))
        (Statements))
    {+(Pattern
      {+(Statements
        {+(Send
          {+(Identifier)+})+})+}
      {+(Statements)+})+}
    {+(Send
      {+(Identifier)+})+}
    {-(Pattern
      {-(Statements
        {-(Send
          {-(Identifier)-})-}
        {-(Send
          {-(Identifier)-})-})-}
      {-(Statements
        {-(Send
          {-(Identifier)-})-})-})-}
    {-(Statements)-})))