/*
--------------------------------------------------
   ２重ループによる模様3  For_moyou3
--------------------------------------------------
*/
import java.io.*;
class For_moyou3 {
	public static void main(String[] args ) throws Exception{
		
		int i,j;
		
		
		for ( i=1 ; i<=10 ; i++ ) {		
			for ( j=1 ; j<=i ; j++ ) {	
				System.out.print("◆");
			}
			System.out.print("\n");
		}
		
		
		for ( i=1 ; i<=10 ; i++ ) {		
			for ( j=i ; j<=10 ; j++ ) {	
				System.out.print("◆");
			}
			System.out.print("\n");
		}
		
	}
}