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 <stdio.h>

int main(){


	int h, w, x, y;


	while(1){

		scanf( "%d %d", &h, &w );

		for( x=0; x<w; x++ ) printf( "#" );
		printf( "\n" );

		for( y=1; y<(h-1); y++ ){

			printf( "#" );

			for( x=1; x<(w-1); x++){
				printf( "." );
			}

			printf( "#" );
		}

		printf( "\n" );

		for( x=0; x<w; x++ ) printf( "#" );
		printf( "\n" );

	}


	return 0;

}