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 C++ (judge verdict: Time Limit Exceeded)

#include <iostream>

int main(int argc, char const* argv[])
{
	int h,w;
	std::cin >> h >> w;
	while (!(h==0&&h==w)) {
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < w; i++) {
				if (i==0||i==h-1||j==0||j==w-1) {
					std::cout << "#" ;
				} else {
					std::cout << "." ;
				}
			}
			std::cout << std::endl;
		}
		std::cout << std::endl;
		std::cin >> h >> w;
	}

	return 0;
}