import java.util.Scanner;

public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        }
    }
} Main public static Scanner sc = new Scanner(System.in); sc new Scanner(System.in) public static void main(String[] args) throws Exception {
        while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        }
    } main {
        while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        }
    } while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        } sc.hasNext() sc.hasNext sc {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            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++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            } int i = 0; int i = 0; i 0 i < h i h i++ i++ i {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            } {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            } StringBuilder sb = new StringBuilder(); sb new StringBuilder() for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                } 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) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                } {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                } if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    } 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 {
                        sb.append("#");
                    } sb.append("#") sb.append sb "#" {
                        sb.append(".");
                    } sb.append(".") sb.append sb "." System.out.println(sb.toString()) System.out.println System.out System System.out sb.toString() sb.toString sb System.out.println("") System.out.println System.out System System.out "" String[] args args public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        }
    }
} public class Main {
    public static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        while (sc.hasNext()) {
            int h = sc.nextInt();
            int w = sc.nextInt();
            if (h == 0 && w == 0) break;
            for (int i = 0; i < h; i++) {
                StringBuilder sb = new StringBuilder();
                for (int j = 0; j < w; j++) {
                    if (i == 0 || i == h-1 || j == 0 || j == w-1) {
                        sb.append("#");
                    } else {
                        sb.append(".");
                    }
                }
                System.out.println(sb.toString());
            }
            System.out.println("");
        }
    }
} Main
import java.util.Scanner;

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