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)

/* ITP1_5_B */
import java.io.*;

class Main
{
  public static void main(String[] args) throws IOException
  {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

    while(true){
      //input
      String str[] = br.readLine().split(" ");
      int height = Integer.parseInt(str[0]);
      int width = Integer.parseInt(str[1]);
      //finish
      if(height == 0 && width == 0) break;
      if(height < 3 && width > 100) break;
      //draw
      for(int i = 0; i < height; i++){ //height

        for(int j = 0; j < width; j++){ //width

          if(i == 0 || i == height-1){
            System.out.print("#");

          }else {
            if(j == 0 || j== width-1)
              System.out.print("#");
            else
              System.out.print(".");
          }
        }
        System.out.println("");
      }
      System.out.println("");
    }
  }
}