ӣţţ  ţţ¼  ţţ  ţţƭ  ţţô  ţţ  ţţ  ţţƭ  ţţ  ţţֱ  ţţ  ţţ½  ţţƭ  ţţ  ţţ  ţţ  ţţ¼  ţţ  ţţƻ  ţţ