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 = 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("");
        }

        sc.close();
    }
} 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 = 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("");
        }

        sc.close();
    }
} 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 = 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("");
        }

        sc.close();
    } 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 = 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("");
        }

        sc.close();
    } 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 = 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 {
            int h = sc.nextInt();
            int w = sc.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.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 = 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 "" sc.close() sc.close sc 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 = 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("");
        }

        sc.close();
    }
} 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 = 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("");
        }

        sc.close();
    }
} 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 = 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("");
        }

        sc.close();
    }
}
