ӣţţͼ  ţţ  ţţ  ţţ淨  ţţ  ţţ½  ţţ  ţţ  ţţͼ  ţţע  ţţ  ţţ  ţţ  ţţ½  ţţ  ţţ½  ţţ  ţţ  ţţ  ţţ