text: config const n = 11;
  var s0 = "kiss kiss";
  
  var l0: atomic int;
  var l1: atomic int;
  
  begin {
    l0.write(1);
    l1.waitFor(1);
    writeln(s0);
  }
  
  writeln(s0);
  l0.waitFor(1);
  s0 = "bang bang";
  l1.write(1);
  