(Program
  (Call
    (Identifier)
  {  +(TextElement)+ }
  {  +(Identifier)+  }
	{  -(TextElement)- }
    (Empty))
  (Call
    (Identifier)
    (TextElement)
  {  +(Identifier)+   }
  {  +(Identifier)+   }
  {  -(Null)-   }
    (Empty))
{ +(Call
    (Identifier)
    (TextElement)
    (Empty))+ }
{-(Call
    (Identifier)
    (TextElement)
    (Identifier)
    (Identifier)
    (Empty))-})