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;
int i,j;

while(1){
for (i = 0 ; i < H ; i++){
for (j = 0 ; j < W ; j++){
if (i == 0 || j == 0 || i == H || j == W){printf("#");}else{printf(".");}

}
printf("\n");
}
printf("\n");

}
return 0;
}