因簡書改版后無法添加擴展鏈接，20170324問題解析請到公眾號查看，問題解析在公眾號首發，公眾號ID：weknow619。

package Mar2017;

public class Ques0327 {

    public static void main(String[] args) {
        MyThread t1 = new MyThread("t1");
        MyThread t2 = new MyThread("t2");
        t1.start();
        t2.start();
    }

}

class MyThread extends Thread {
    public void output(String s) {
        System.out.println(s);
    }

    public void run() {
        for (int i = 0; i < 10; ++i) {
            try {
                sleep((long)(3000*Math.random()));
            } catch (Exception e) {
                // TODO: handle exception
            }
            output(getName());
        }
    }
    
    public MyThread(String s) {
        super(s);
    }
}

今日問題：
請問主程序運行結果是什么？