(Statements
  (AugmentedAssignment
  { (RShift
    {-(Identifier)-}
    {-(Integer)-})
  ->(Plus
    {+(Identifier)+}
    {+(Integer)+}) })
{+(AugmentedAssignment
  {+(RShift
    {+(Identifier)+}
    {+(Integer)+})+})+}
{+(AugmentedAssignment
  {+(DividedBy
    {+(Identifier)+}
    {+(Integer)+})+})+}
{-(AugmentedAssignment
  {-(DividedBy
    {-(Identifier)-}
    {-(Integer)-})-})-}
{-(AugmentedAssignment
  {-(Plus
    {-(Identifier)-}
    {-(Integer)-})-})-})