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;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int cnt1 = 0;
		int cnt2 = 0;

		while(true) {

			int H = sc.nextInt();
			int W = sc.nextInt();

			if(H == 0 && W == 0)
				break;

			for(cnt1 = 0; cnt1 < W; cnt1++ ) {

				System.out.print("#");

			}

			System.out.println("");

			for(cnt2 = 0; cnt2 < H-2; cnt2++) {

				System.out.print("#");

				for(cnt1 = 0; cnt1 < W-2; cnt1++ ) {

					System.out.print(".");

				}

				System.out.println("#");

			}

			for(cnt1 = 0; cnt1 < W; cnt1++ ) {

				System.out.print("#");

			}
			System.out.println("");
			System.out.println("");
		}
		sc.close();}
}