/* 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 ClassB {
    }
 
    static class ClassA extends ClassB {
    }
 
    static void printHierarchy (Class<?> clz) {
        if (clz != null) {
            System.out.println(clz.getSimpleName());
            System.out.print("inherits from: ");
            printHierarchy(clz.getSuperclass());
        } else {
        	System.out.println("nothing");
        }
    }
 
    public static void main (String[] args) {
        printHierarchy(ClassA.class);
    }
 
}

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