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,i,j,k=0;

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

  while(h!=0&&w!=0){
    for(i=0;i<h;i++){
      for(j=0;j<w;j++){
	if(i==0||i==h-1||j==0||j==w-1){
	  printf("#");
	}
	else printf(".");
      }
      printf("\n");
    }
  }

  return 0;
}