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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		System.out.println();
		} true {
		int H = sc.nextInt();
		int W = sc.nextInt();
		if(H==0 && W==0) break;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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; for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		} int i = 1; int i = 1; i 1 i <= H i H i++ i++ i {
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		} {
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		} for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			} int j = 1; int j = 1; j 1 j <= W j W j++ j++ j {
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			} {
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			} if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				} i==1||i==H||j==1||j==W j==1 i==1||i==H||j==1||j==W i==1 i 1 i==H i H j==1 j 1 j==W j W {
					System.out.print("#");
				} System.out.print("#") System.out.print System.out System System.out "#" {
					System.out.print(".");
				} System.out.print(".") System.out.print 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 String[] args args 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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		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;
		for(int i = 1;i <= H;i++){
			for(int j = 1;j <= W;j++){
				if(i==1||i==H||j==1||j==W){
					System.out.print("#");
				}else{
					System.out.print(".");
				}
			}
			System.out.println();
		}
		System.out.println();
		}
	}
}