ӣţţ  ţţ  ţţ  ţţ½  ţţ  ţţ¼  ţţô  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ¼  ţţô  ţţͼ  ţţ  ţţ  ţţ  ţţ  ţţ