import java.util.*;

class Main {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      while (true) {
         int H = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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.util.*; util.* java class Main {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      while (true) {
         int H = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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) {
      Scanner sc = new Scanner(System.in);
      while (true) {
         int H = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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 {
      Scanner sc = new Scanner(System.in);
      while (true) {
         int H = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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();
      }
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) while (true) {
         int H = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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 = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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 = Integer.parseInt(sc.next()); H Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int W = Integer.parseInt(sc.next()); W Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc if ((H > 300 || W > 300) || (H == 0 && W == 0)) break; (H > 300 || W > 300) || (H == 0 && W == 0) (H > 300 || W > 300) H > 300 H 300 W > 300 W 300 (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) (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.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
import java.util.*;

class Main {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      while (true) {
         int H = Integer.parseInt(sc.next());
         int W = Integer.parseInt(sc.next());
         if ((H > 300 || W > 300) || (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();
      }
   }
}