{-(Program
  (Function
    (Identifier)
    (Params
      (Identifier)
      (Identifier))
    (Function
      (Identifier)
      (Params
        (Identifier)
        (Identifier))
      (ExpressionStatements
        (FunctionCall
          (Identifier)
          (Identifier)
          (Identifier)))
      (ExpressionStatements
        (FunctionCall
          (Identifier)
          (Identifier)
          (Identifier))))))-}