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) {
        var a = 0;
        while (true) {
            System.out.println("Hello world!");
           if (a > 10) {
               break;
           }else{
               a++;
           }
        }
        
    }
}