import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
  
  String a = "vik";
  String b = "cik";
   
  // " " this comma will use remember this
  
   if (a.equals("vik"))
   System.out.println("yes");
   else
System.out.println("noo");
  
  
  
  
  
  
    }
}