(Program
  (Call
    (Identifier)
  {-(Identifier)-}
    (Empty))
  (Call
    (Identifier)
  {+(Identifier)+}
    (Empty))
  (Call
    (Identifier)
  {-(Identifier)-}
    (Identifier)
  {+(Identifier)+}
    (Empty))
{+(Call
  {+(MemberAccess
    {+(Identifier)+}
    {+(Identifier)+})+}
  {+(Integer)+}
  {+(Empty)+})+})