csharp, 177 bytes

Result

AC

Duration

1176ms

Code [DL]

using System;class A{static int r()=>int.Parse(Console.ReadLine());static void Main(){for(int h=r(),w=r(),i=++w*h;i-->0;)Console.Write(-~i%w>2&i>w&i<w*h-w?" ":i%w>0?"*":"\n");}}

stdin

26
16

stdout

****************
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
*              *
****************

stderr