// Online Java Compiler
// Use this editor to write, compile and run your Java code online

class HelloWorld {
    public static void main(String[] args) {
        int n=4;
        for (int i=1; i<=n; i++){
            for(int j=i; j<=n; j++){
                System.out.print(" ");
            }
            for(int j=1; j<i; j++){
                System.out.print("*");
            }
            for(int j=1; j<=i; j++){
                System.out.print("*");
            }
            System.out.println(" ");
            
        }
                for(int i=1; i<=n; i++){
            for(int j=1; j<=i; j++){
                System.out.print(" ");
            }
            for(int j=i; j<n; j++ ){
                System.out.print("*");
            }
            for(int j=i; j<=n; j++ ){
                System.out.print("*");
            }
            System.out.println();
        }
       
}
}