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.*;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner cin=new Scanner(System.in);
		
		while(true) {
			int H=cin.nextInt(),W=cin.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.print("\n");
			}
			System.out.print("\n");
		}

	}

}