ӣţţ  ţţƭ  ţţ  ţţ  ţţ  ţţ  ţţ  ţţƭ  ţţô  ţţ  ţţ  ţţֱ  ţţ  ţţ½  ţţ  ţţ  ţţ½  ţţ½  ţţ  ţţֱ