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 JAVA (judge verdict: Accepted)

import java.util.Scanner;

public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
while (true){
int H = sc.nextInt();
int W = sc.nextInt();
if(H == 0 && W == 0){
break;
}
for(int i = 1;i <= H;i++){
for(int j = 1;j <= W;j++){
if(i == 1 || i == H || j == 1 || j == W){
System.out.printf("#");
}else{
System.out.printf(".");
}
}
System.out.printf("\n");
}
System.out.printf("\n");
}
sc.close();
}
}