(Program
  (Function
    (Empty)
    (Empty)
    (Identifier)
    (RequiredParameter
      (Empty)
      (Empty)
      (Empty)
      (Assignment
        (Identifier)
        (Empty)))
    (RequiredParameter
      (Empty)
      (Empty)
      (Empty)
      (Assignment
        (Identifier)
        (Empty)))
    (Statements
      (DoWhile
        (Identifier)
        (Statements
          (Call
            (Identifier)
            (Identifier)
            (Empty)))))))