package homework;

public class HomeWork {
	public static void main(String[] args) {
		Thread t1 = new DataA();
		Thread t2 = new CharA();
		t1.start();
		t2.start();
	}
}

class DataA extends Thread {
	int i = 1;

	public void run() {

		while (i <= 52) {
			System.out.print(i );
			System.out.print(++i);
			yield();
			i++;
		}
	}
}

class CharA extends Thread {
	char c = 'a';
	public void run() {
		
		while (c <= 'z') {
			System.out.print(c);
			yield();
			c++;
		}
	}
}