/* 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 Ideone
{
	static class Base {
		public Base() {}
		public void foo() {
			System.out.println("I'm the base!");
		}
	}
 
	static class Child extends Base {
		public Child() {}
		public void foo() {
			System.out.println("I'm the child!");
		}
	}
 
	public static void main (String[] args) throws java.lang.Exception
	{
		Child x = new Child();
		Base y = (Base) x;
		y.foo();
	}
}

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