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);
    int [] h = new int [10000];
    int [] w = new int [10000];
    int m = 0;
    for(int i=0;;i++){
      int H = sc.nextInt();
      int W = sc.nextInt();
      h[i] = H;
      w[i] = W;
      if(H == 0 && W == 0) break;
      m++;
    }
    for(int l=0;l<m;l++){
      for(int j=0;j<h[l];j++){
        if(j == 0 || j == h[l] -1){
          for(int k=0;k<w[l];k++){
            System.out.printf("#");
          }
          System.out.printf("\n");
        }else{
          System.out.printf("#");
          for(int k=2;k<w[l];k++){
            System.out.printf(".");
          }
          System.out.printf("#\n");
        }
      }
      System.out.printf("\n");
    }
  }
}