/* 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 First { public void doSmth() { System.out.println("First"); } }
  static class Second { public void doSmth() { System.out.println("Second"); } }
 
  static interface DoSmth { void doSmth(); }
  static class FirstWrapper extends First implements DoSmth {}
  static class SecondWrapper extends Second implements DoSmth {}
 
  public static void main(String[] args) throws java.lang.Exception {
    doSmth(new FirstWrapper());
    doSmth(new SecondWrapper());
  }
 
  public static void doSmth(DoSmth smth) {
    smth.doSmth();
  }
}

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