import java.io.InputStreamReader;
import java.util.Scanner;
public class Main{
	public static void main (String args[]){
		Scanner sc=new Scanner(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	}
} import java.io.InputStreamReader; InputStreamReader java.io import java.util.Scanner; Scanner java.util public class Main{
	public static void main (String args[]){
		Scanner sc=new Scanner(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	}
} Main public static void main (String args[]){
		Scanner sc=new Scanner(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	} main {
		Scanner sc=new Scanner(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	} Scanner sc=new Scanner(new InputStreamReader(System.in)); sc new Scanner(new InputStreamReader(System.in)) while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				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;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				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; h==0&&w==0 h==0 h 0 w==0 w 0 break; 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 System System.out "#" System.out.println("") System.out.println System.out System System.out "" for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			} int i=2; int i=2; i 2 i<=h-1 i h-1 h 1 i++ i++ i {
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			} {
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			} System.out.print("#") System.out.print System.out System System.out "#" for(int j=2;j<=w-1;j++) System.out.print("."); int j=2; int j=2; j 2 j<=w-1 j w-1 w 1 j++ j++ j System.out.print("."); System.out.print(".") System.out.print System.out System System.out "." 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 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(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	}
} public class Main{
	public static void main (String args[]){
		Scanner sc=new Scanner(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	}
} Main
import java.io.InputStreamReader;
import java.util.Scanner;
public class Main{
	public static void main (String args[]){
		Scanner sc=new Scanner(new InputStreamReader(System.in));
		while(true){
			int h=sc.nextInt();
			int w=sc.nextInt();
			if(h==0&&w==0) break;
			for(int i=0;i<w;i++) System.out.print("#");	
			System.out.println("");
			for(int i=2;i<=h-1;i++){
				System.out.print("#");
				for(int j=2;j<=w-1;j++) System.out.print(".");
				System.out.print("#");
				System.out.println("");
			}
			for(int i=0;i<w;i++) System.out.print("#");
			System.out.println("");
			System.out.println("");
		}
		sc.close();
	}
}