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;
  scanf("%d%d",&h,&w);
  while(1){
    if(h==0&&w==0)
      break;
  for(i=1;i<=h;i++){
    for(j=1;j<=w;j++){
      if((j!=1)&&(j!=w)&&(i!=1)&&(i!=h))
	printf(".");
      else
	printf("#");
    }
    printf("\n");
  }
  }
  return 0;
}