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 JavaScript (judge verdict: Accepted)

var input = require('fs').readFileSync('/dev/stdin', 'utf8');
let sp = input.split("\n");
for( let i = 0; sp[i] !== "0 0"; i++ ) {
  let hw = sp[i].split(" ").map(Number);
  let h = hw[0]; w = hw[1];
  for( let hh = 0; hh < h; hh++ ) {
    let row = "";
    for( let ww = 0; ww < w; ww++ ) {
      if( hh === 0 || hh === h - 1 || ww === 0 || ww === w - 1 ) {
        row += "#";
      } else {
        row += ".";
      }
    }
    console.log(row);
  }
  console.log();
}