ӣţţ  ţţ  ţţ  ţţƻ  ţţ淨  ţţ½  ţţ  ţţ  ţţ  ţţ½  ţţ淨  ţţ  ţţ  ţţ  ţţ  ţţ  ţţֱ  ţţ  ţţͼ  ţţֱ