using System;


class HelloWorld
{
    static void Main()
    {
        int n, m;

        n = Convert.ToInt32(Console.ReadLine());
        m = Convert.ToInt32(Console.ReadLine());

        for(int i = 0; i <= n; i++)
        {
            for(int j = 0; j <= m; j++)
            {
                if(i == 0 || j == 0 || i == n || j == m)
                {
                    Console.Write("*");
                }
                else
                {
                    Console.Write(" ");
                }
            }
            Console.WriteLine();
        }
    }
}