import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	}
} Main public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	} main {
		Scanner scan = new Scanner(System.in);
		while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		} true {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

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

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	}
} public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		while(true) {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0) {
				break;
			}

			for(int i = 0; i < h; i++) {
				for(int j = 0; j < w; j++) {
					if((i == 0 || i == h - 1) || (j == 0 || j == w - 1)) {
						System.out.printf("#");
					}
					else {
						System.out.printf(".");
					}
				}
				System.out.println("");
			}
			System.out.println("");
		}

		scan.close();
	}
}
