correction:   
     ((a b &&))((c d & &&)) for EBNF: a { b a } c { d c }   
   should be:   
     ((a b &&))((c d &&)) for EBNF: a { b a } c { d c }   
      
   and   
     ((a b && c d & &&))   
   should be:   
     ((a b && c d &&))   
      
   Don't know how those extraneous single "&" got there!   
      
   Carl   
   ---   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)