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.*;

class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int W,H;
for(;;){
H =sc.nextInt();
W =sc.nextInt();
if(H == 0) break;
for(int a=0; a<W; a++) System.out.print("#");
System.out.println();
for(int c=2; c<H; c++){
System.out.print("#");
for(int b=2; b<W; b++) System.out.print(".");
System.out.println("#");
}
for(int a=0; a<W; a++) System.out.print("#");
System.out.println();
System.out.println();
}
}
}