import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        } true {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        } String[] lines = br.readLine().split(" "); lines br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " int h = Integer.parseInt(lines[0]); h Integer.parseInt(lines[0]) Integer.parseInt Integer lines[0] lines 0 int w = Integer.parseInt(lines[1]); w Integer.parseInt(lines[1]) Integer.parseInt Integer lines[1] lines 1 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.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||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||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||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||j==0||j==w-1){
                        System.out.print("#");
                    }else{
                        System.out.print(".");
                    }
                } {
                    if(i==0||i==h-1||j==0||j==w-1){
                        System.out.print("#");
                    }else{
                        System.out.print(".");
                    }
                } if(i==0||i==h-1||j==0||j==w-1){
                        System.out.print("#");
                    }else{
                        System.out.print(".");
                    } i==0||i==h-1||j==0||j==w-1 j==0 i==0||i==h-1||j==0||j==w-1 i==0 i 0 i==h-1 i h-1 h 1 j==0 j 0 j==w-1 j w-1 w 1 {
                        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) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    }
} public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String[] lines = br.readLine().split(" ");
            int h = Integer.parseInt(lines[0]);
            int w = Integer.parseInt(lines[1]);
            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.print("#");
                    }else{
                        System.out.print(".");
                    }
                }
                System.out.println();
            }
            System.out.println();
        }
    }
}