Disk

using System;

namespace Disc
{
	class Disk
	{
		public static void Main(string[] args)
		{
			int n = int.Parse(Console.ReadLine());
			int r = int.Parse(Console.ReadLine());
			int rowCenter = n / 2,
				colCenter = n / 2;
			for(int col = 0; col < n; col++)
			{
				for(int row = 0; row < n; row++)
				{
					int deltaX = row - rowCenter,
						deltaY = col - colCenter;
					double distanceCenter = Math.Sqrt(deltaX * deltaX + deltaY * deltaY);
					bool inDisc = distanceCenter <= r;
					if(inDisc)
					{
						Console.Write("*");
					}
					else
					{
						Console.Write(".");
					}
				}
				Console.WriteLine();
			}

		}
	}
}