(Program
{-(TextElement)-}
  (TextElement)
{ (TextElement)
->(TextElement) }
{+(TextElement)+}
{+(TextElement)+}
{ (TextElement)
->(TextElement) }
{+(TextElement)+}
{ (TextElement)
->(TextElement) }
{-(TextElement)-}
{-(TextElement)-}
  (TextElement)
{+(TextElement)+})