import 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;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		}
	}
} import java.util.*; util.* java 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;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					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=sc.nextInt();
			int W=sc.nextInt();
			if(H==0&&W==0){
				break;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		}
	} main {
		Scanner sc = new Scanner(System.in);
		while(true){
			int H=sc.nextInt();
			int W=sc.nextInt();
			if(H==0&&W==0){
				break;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		}
	} 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;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		} true {
			int H=sc.nextInt();
			int W=sc.nextInt();
			if(H==0&&W==0){
				break;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					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;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			} H==0&&W==0 H==0 H 0 W==0 W 0 {
				break;
			} break; {
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			} for(int i=0;i<W;i++){
					System.out.print("#");
				} int i=0; int i=0; i 0 i<W i W i++ i++ i {
					System.out.print("#");
				} {
					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 for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				} int i=1; int i=1; i 1 i<H-1 i H-1 H 1 i++ i++ i {
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				} {
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				} System.out.print("#") System.out.print System.out System System.out "#" for(int j=1;j<W-1;j++){
						System.out.print(".");
					} int j=1; int j=1; j 1 j<W-1 j W-1 W 1 j++ j++ j {
						System.out.print(".");
					} {
						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 "#" for(int i=0;i<W;i++){
					System.out.print("#");
				} int i=0; int i=0; i 0 i<W i W i++ i++ i {
					System.out.print("#");
				} {
					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 sc = new Scanner(System.in);
		while(true){
			int H=sc.nextInt();
			int W=sc.nextInt();
			if(H==0&&W==0){
				break;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		}
	}
} 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;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		}
	}
} Main
import 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;
			}else{
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				for(int i=1;i<H-1;i++){
					System.out.print("#");
					for(int j=1;j<W-1;j++){
						System.out.print(".");
					}
					System.out.println("#");
				}
				for(int i=0;i<W;i++){
					System.out.print("#");
				}
				System.out.println();
				System.out.println();
			}
		}
	}
}