import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							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 scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	}
}
} Main public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	}
} main {
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	}
} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int i i v; v for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	} ; {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	} {
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	} int h = scan.nextInt(); h scan.nextInt() scan.nextInt scan int w = scan.nextInt(); w scan.nextInt() scan.nextInt scan if(h == 0 && w == 0)
				break; h == 0 && w == 0 h == 0 h 0 w == 0 w 0 break; for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		} i = 1; i = 1 i 1 i <= h i h ++i ++i i {
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		} {
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		} for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				} v = 1; v = 1 v 1 v <= w v w ++v ++v v {
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				} {
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				} if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					} i == h || i == 1 i == h i h i == 1 i 1 {
						System.out.print("#");
					} System.out.print("#") System.out.print System.out System System.out "#" if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					} i != 1 || i != h i != 1 i 1 i != h i h {
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					} if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						} v == 1 || v == w v == 1 v 1 v == w v w {
							System.out.print("#");
						} System.out.print("#") System.out.print System.out System System.out "#" if(v != 1 || v != w){
							System.out.print(".");
						} v != 1 || v != w v != 1 v 1 v != w v w {
							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 scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	}
}
} public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	}
}
} Main
import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		int i,v;
		for(;;){
			int h = scan.nextInt();
			int w = scan.nextInt();
			if(h == 0 && w == 0)
				break;
				for(i = 1; i <= h; ++i){
					for(v = 1; v <= w; ++v){
					if(i == h || i == 1){
						System.out.print("#");
					}
					else if(i != 1 || i != h){
						if(v == 1 || v == w){
							System.out.print("#");
						}
						else if(v != 1 || v != w){
							System.out.print(".");
						}
					}
				}
					System.out.println("");
		}
				System.out.println("");
	}
}
}