class OuterClass {
 class InnerClass {
 void innerDisplay() {
 System.out.println("Message from inner class");
 }
 }
 
 void display() {
 System.out.println("Message from outer class");
 }
}
public class nestedClass {
 public static void main(String[] args) {
 OuterClass outer = new OuterClass();
 outer.display();
 OuterClass.InnerClass inner = outer.new InnerClass();
 inner.innerDisplay();
 }
}

class OuterClass {
 static class InnerClass {
 void innerDisplay() {
 System.out.println("Message from inner class");
 }
 }
 
 void display() {
 System.out.println("Message from outer class");
 }
}
public class nestedClass {
 public static void main(String[] args) {
 OuterClass outer = new OuterClass();
 outer.display();
 OuterClass.InnerClass inner = new OuterClass.InnerClass();
 inner.innerDisplay();
 }
}