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!");
        int num = 76895;
        int rev=0;
        while(num>0){
        rev = rev *10+num%10;
        num = num/10;
        }
          System.out.println(rev);
    }
}