ӣţţô  ţţ  ţţֱ  ţţ  ţţ  ţţ  ţţ½  ţţ  ţţ  ţţô  ţţ¼  ţţ  ţţ  ţţע  ţţ  ţţƻ  ţţ  ţţֱ  ţţ  ţţ