Problem:
Print a Frame

Draw a frame which has a height of H cm and a width of W cm. For example, the following figure shows a frame which has a height of 6 cm and a width of 10 cm.

##########
#........#
#........#
#........#
#........#
##########

Input

The input consists of multiple datasets. Each dataset consists of two integers H and W separated by a single space.

The input ends with two 0 (when both H and W are zero).

Output

For each dataset, print the frame made of '#' and '.'.

Print a blank line after each dataset.

Constraints

3 ≤ H ≤ 300

3 ≤ W ≤ 300

Sample Input

3 4
5 6
3 3
0 0

Sample Output

####
#..#
####

######
#....#
#....#
#....#
######

###
#.#
###

Solution in JAVA (judge verdict: Accepted)



import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args){
		BufferedReader insBR = new BufferedReader(new InputStreamReader(System.in));
		while(true){
			try{
				String[] strA = insBR.readLine().split(" ");
				int[] intA = new int[strA.length];
				for(int i = 0;i < strA.length ;i++){
					intA[i] = Integer.parseInt(strA[i]);
				}
				if(intA[0] == 0 && intA[1] == 0){
					break;
				}else{
					for(int j = 0; j <intA[1]; j++){
						System.out.print("#");
					}
					System.out.println();
					for(int i = 0;i < intA[0] - 2;i++){
						System.out.print("#");
						for(int j = 0; j < intA[1]-2;j++){
							System.out.print(".");
						}
						System.out.println("#");
					}
					for(int j = 0; j <intA[1]; j++){
						System.out.print("#");
					}
					System.out.println();
					System.out.println();
				}
			}catch(IOException e){
				e.printStackTrace();
			}catch(NumberFormatException e){
				e.printStackTrace();
			}
		}
	}

}