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

// The main method must be in a class named "Main".
class Main {


 static void StarPattern(int x){
     
     for (int j=0; j<=x ; j++)
     {
         for (int i =0; i<=j ; i++)
          System.out.print("*");
           System.out.println(" ");
     }
     
 }
 
 

   public static void main(String[] args) {
        System.out.println("Hello world!");
  
        StarPattern(10);
  
  
  
  
  
  
  
    }
}