请指出下面Java代码的运行结果

package Hello;

public class Hello {

public static void main(String[] args) {
    A ab = new B();
    ab = new B();
}

}

class A{
static{
System.out.print("1");
}

public A(){
    System.out.print("2");
}

}

class B extends A{
static{
System.out.print("a");
}

public B(){
    System.out.print("b");
}

}

2b LZ是在找骂吗？