import javax.swing.*;

public class Assignment4 {
    public static void main( String[] args ) {
	char c='Z';
	String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	String blanks =   "                         ";
	String input;
	/*
	do {
	    do {
		input = JOptionPane.showInputDialog( "Enter a letter" );
		if ( ! Character.isLetter( input.charAt(0)) &&
		     input.charAt(0)!='#' )
		    JOptionPane.showMessageDialog( null, "Must be a letter" );
	    } while ( ! Character.isLetter( input.charAt(0)) && input.charAt(0)!='#' );
	    
	    c = Character.toUpperCase( input.charAt(0) );
	    if ( c != '#' )
	*/
		for (int row=0; row<=c-'A'; row++)
		    /*		    System.out.println( blanks.substring(0,c-'A'-row) + 
					alphabet.substring(0,row+1) +
					new StringBuffer(alphabet.substring(0,row)).reverse());
		    */
		    System.out.println( 
		       "                         ".substring(0,c-'A'-row) + 
		       "ABCDEFGHIJKLMNOPQRSTUVWXYZ".substring(0,row+1) +
		       "ZYXWVUTSRQPONMLKJIHGFEDCBA".substring(26-row,26));
		//} while ( c != '#' );

	System.exit(0);
    }
}