ӣţţ  ţţ淨  ţţô  ţţ  ţţ¼  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţ½  ţţƭ  ţţô  ţţͼ  ţţֱ  ţţ  ţţ  ţţ  ţţ½