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.util.Scanner;

/**
 * @author kawakami
 *
 */
class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
		int H,W;
		
		
		
		while(true){
			H = as.nextInt();
			W = as.nextInt();
			
			if(H==0 && W==0){
				
				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();
		}
		
		

	}

}