while   ( a)   {
  " something strange"
} 

do ;  while( r.test)  {
    {"good"}
};

do  { {"command"}  } while(r.test1() + r     );
 
do {
    "ok"
}while ( (s||b.some() ))

    while (sss) ;

   while(a && (f.test() || x.test())) {
       print("ok");
        }