import java.util.Scanner;

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 < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			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 sc = new Scanner(System.in);
        while(true){
        int H = sc.nextInt();
        int W = sc.nextInt();
        if ( H < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(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 = sc.nextInt();
        int W = sc.nextInt();
        if ( H < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(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 = sc.nextInt();
        int W = sc.nextInt();
        if ( H < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(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 = sc.nextInt();
        int W = sc.nextInt();
        if ( H < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            }
            System.out.println("");
        }
        System.out.println();
    } true {
        int H = sc.nextInt();
        int W = sc.nextInt();
        if ( H < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			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 < 3 ) break; H < 3 H 3 break; for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(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 {
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            }
            System.out.println("");
        } {
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            }
            System.out.println("");
        } if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            } i==0 || i==H-1 i==0 i 0 i==H-1 i H-1 H 1 {
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 } for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                } int j = 0; int j = 0; j 0 j < W j W j++ j++ j {
               
                    System.out.print("#");
                    
                } {
               
                    System.out.print("#");
                    
                } System.out.print("#") System.out.print System.out System System.out "#" {
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            } for ( int j = 0; j < W; j++ ){
            		if(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(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            } {
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            } if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		} 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 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 < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			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 < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            }
            System.out.println("");
        }
        System.out.println();
    }
}
} Main
import java.util.Scanner;

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 < 3 ) break;
        for ( int i = 0; i < H; i++ ){
        	 if(i==0 || i==H-1){
            for ( int j = 0; j < W; j++ ){
               
                    System.out.print("#");
                    
                }
        	 }
            else{
            	for ( int j = 0; j < W; j++ ){
            		if(j==0 || j==W-1){
            			System.out.print("#");
            		}
            		else{
            			System.out.print(".");
            		}
            }
            }
            System.out.println("");
        }
        System.out.println();
    }
}
}
