(Program
  (OperatorAssignment
    (Identifier)
  { (IntegerLiteral)
  ->(IntegerLiteral) })
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral))
  (OperatorAssignment
    (Identifier)
    (IntegerLiteral)))