{+(Program
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral)))+}