import java.io.*;

class Main{
	public static void main(String args[]) throws IOException{
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

			if(W==0 && H==0)
				break;
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			}
			System.out.println();
		}		
	}
} import java.io.*; io.* java class Main{
	public static void main(String args[]) throws IOException{
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

			if(W==0 && H==0)
				break;
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			}
			System.out.println();
		}		
	}
} Main public static void main(String args[]) throws IOException{
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

			if(W==0 && H==0)
				break;
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			}
			System.out.println();
		}		
	} main {
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

			if(W==0 && H==0)
				break;
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			}
			System.out.println();
		}		
	} BufferedReader buf = new BufferedReader(new InputStreamReader(System.in)); buf new BufferedReader(new InputStreamReader(System.in)) while(true){
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

			if(W==0 && H==0)
				break;
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			}
			System.out.println();
		} true {
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

			if(W==0 && H==0)
				break;
			for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			}
			System.out.println();
		} String[] str = buf.readLine().split(" "); str buf.readLine().split(" ") buf.readLine().split buf.readLine() buf.readLine buf " " int H = Integer.parseInt(str[0]); H Integer.parseInt(str[0]) Integer.parseInt Integer str[0] str 0 int W = Integer.parseInt(str[1]); W Integer.parseInt(str[1]) Integer.parseInt Integer str[1] str 1 if(W==0 && H==0)
				break; W==0 && H==0 W==0 W 0 H==0 H 0 break; for(int i=0; i<H; i++){
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-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 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			} {
				for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				}
				System.out.println();
			} for(int j=0; j<W; j++){
					if(i==0 || j==0 || j==W-1 || i==H-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 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				} {
					if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print(".");
				} if(i==0 || j==0 || j==W-1 || i==H-1 )
						System.out.print("#");
					else
						System.out.print("."); i==0 || j==0 || j==W-1 || i==H-1 j==W-1 i==0 || j==0 || j==W-1 || i==H-1 i==0 i 0 j==0 j 0 j==W-1 j W-1 W 1 i==H-1 i H-1 H 1 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 System.out.println() System.out.println System.out System System.out String args[] args
import java.io.*;

class Main{
	public static void main(String args[]) throws IOException{
		BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			String[] str = buf.readLine().split(" ");
			int H = Integer.parseInt(str[0]);
			int W = Integer.parseInt(str[1]);

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