import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	} main {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		} true {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		} int h = sc.nextInt(); h sc.nextInt() sc.nextInt sc int w = sc.nextInt(); w sc.nextInt() sc.nextInt sc if (h == 0 && w == 0) break; h == 0 && w == 0 h == 0 h 0 w == 0 w 0 break; draw(h, w) draw h w System.out.println() System.out.println System.out System System.out String[] args args public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	} draw {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	} for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		} int i = 0; int i = 0; i 0 i < h i h i++ i++ i {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		} {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		} for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			} int j = 0; int j = 0; j 0 j < w j w j++ j++ j {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			} {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			} if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print("."); i == 0 || i == h-1 i == 0 i 0 i == h-1 i h-1 h 1 System.out.print("#") System.out.print System.out System System.out "#" if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print("."); j == 0 || j == w-1 j == 0 j 0 j == w-1 j w-1 w 1 System.out.print("#") System.out.print System.out System System.out "#" System.out.print(".") System.out.print System.out System System.out "." System.out.println() System.out.println System.out System System.out int h h int w w public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			if (h == 0 && w == 0) break;
			draw(h, w);
			System.out.println();
		}

	}

	public static void draw(int h, int w) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; j++) {
				if(i == 0 || i == h-1)System.out.print("#");
				else if(j == 0 || j == w-1)System.out.print("#");
				else System.out.print(".");
			}
			System.out.println();
		}
	}
}