Q. Determine output:
class A{
{
System.out.print("b1 ");
}
public A(){
System.out.print("b2 ");
}
}

class B extends A{
static{
System.out.print("r1 ");
}
public B(){
System.out.print("r2 ");
}
{
System.out.print("r3 ");
}
static{
System.out.print("r4 ");
}
}

public class Test extends B{
public static void main(String[] args){
System.out.print("pre ");
new Test();
System.out.println("post ");
}
}