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==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.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==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 = sc.nextInt();
			int W = sc.nextInt();
			
			if(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 = sc.nextInt();
			int W = sc.nextInt();
			
			if(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 = sc.nextInt();
			int W = sc.nextInt();
			
			if(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 = sc.nextInt();
			int W = sc.nextInt();
			
			if(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 = 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 < 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 j!=0 i!=0&&i!=H-1 && j!=0&&j!=W-1 i!=0 i 0 i!=H-1 i H-1 H 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==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("");
	

	
	}
	
	}
	
} 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;

	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
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==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("");
	

	
	}
	
	}
	
}

