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 argc, const char * argv[]) {
    int i,j,H,W;
    while(1){
        scanf("%d %d",&H,&W);
        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 if(H==0&&W==0){
                    break;
                }else{
                    printf(".");
                }
            printf("\n");
        }
        
        
        printf("\n");
        
    }
    return 0;
}