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 Kotlin (judge verdict: Accepted)

fun main(args: Array<String>) {
    while (true) {
        val (H, W) = readLine()!!.split(" ").map(String::toInt)
        if (H == 0 && W == 0) break
        println("#".repeat(W))
        print("#${".".repeat(W-2)}#\n".repeat(H-2))
        println("#".repeat(W))
        println()
    }
}