/* 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 T1 
{
	public void f() { 
		System.out.println ("hello I'm f() in T1");
	}
}
class T2 extends T1
{
	public void f() { 
		System.out.println ("hello I'm f() in T2");
	}
}
 
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		T1 o = new T2(); 
		o.f(); 
		// your code goes here
	}
}

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