import java.io.PrintStream;
import java.util.Scanner;

public class Triangles
{
    public static void main(String[] args)
    {
	PrintStream output = System.out;
	Scanner input = new Scanner(System.in);

	StringBuffer result = new StringBuffer();
	int size = input.nextInt();
	int symbol = input.nextInt();
	do
	{
	    result.append("size " + size + ", symbol " + symbol + "\n");
	    for (int i = 1; i <= size; i++)
	    {
		for (int j = 0; j < i; j++)
		{
		    result.append(symbol);
		}
		result.append("\n");
	    }
	    result.append("\n");
	    size = input.nextInt();
	    symbol = input.nextInt();
	}
	while (size != 0);
	output.print(result.toString().trim());
    }
}