package homework;
  
public class OThread {
   public static void main(String[] args){
	   Thread t1=new ThreadTest();
	   t1.start();
   }
}


class ThreadTest extends Thread{
	public void run(){
		  int count=1;
		   char xy='a';
		   for(int i=1;i<54;i++){
			   if(count>2){
				   System.out.print(xy++);//(":"+xy++);
				   //System.out.println();
				   count=1;
				   i=i-1;
				   if(i==52){
					   break;
				   }
			   }else{
				   System.out.print(i);//(count==2?i:i+",");
				   count++;
			   }
		   }
	}
}