public class TwoThreads {
    /*public static class Thread1 extends Thread {
        public void run() {
            System.out.println("A");
            System.out.println("B");
        }
    }

    public static class Thread2 extends Thread {
        public void run() {
            System.out.println("1");
            System.out.println("2");
        }
    }
*/
    public static class ThreadAB implements  Runnable{
        String string;
        public ThreadAB(String string){
            this.string=string;
        }
        @Override
        public void run(){
            for(Character c: this.string.toCharArray())
                System.out.print(c);
        }
    }

    static String firstString;
    static String secondString;
    static{
        StringBuilder alphabet = new StringBuilder();
        StringBuilder numbers = new StringBuilder();
        for (int i=1; i <=26; ++i)
            numbers.append(Integer.toString(i) + " ");

        for (char c='A'; c <= 'Z'; ++c)
            alphabet.append(c + " ");

        firstString = alphabet.toString();
        secondString = numbers.toString();
    }
    public static void main(String[] args) {
        //new Thread1().start();
        //new Thread2().start();
        System.out.println(firstString);
        System.out.println(secondString);
        new Thread(new ThreadAB(firstString)).start();
        new Thread(new ThreadAB(secondString)).start();
    }

}