/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Super{
	Super(){
		System.out.print("A");
	}
}
class Sub extends Super
{
	Sub(){
		super();
		System.out.print("B");
	}
	static{
		System.out.print("C");
	}
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.print("D");
		new Sub();
	}
}

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