apl, 111 bytes

Result

WA

Duration

961ms

Code [DL]

a←⎕ARG
b←a[6]
bs←⍕b
h←⍎(bs[2 3])
w←⍎(bs[5 6])
wρ"*"
(h-2) w ρ ("*",((w-2)ρ" "),"*")
wρ"*"

stdin

39
14

stdout

**************
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
*            *
**************
      ^D or end-of-input detected (1). Use )OFF to leave APL!
      ^D or end-of-input detected (2). Use )OFF to leave APL!
      ^D or end-of-input detected (3). Use )OFF to leave APL!
      ^D or end-of-input detected (4). Use )OFF to leave APL!
      *** end of input

stderr

Executable /usr/bin/APs/APserver not found.
This could means that 'apl' was not installed ('make install') or that it
was started in a non-standard way. The expected location of APserver is 
either the same directory as the binary 'apl' or the subdirectory 'APs' of
that directory (the directory should also be in $PATH).
Svar_DB not connected in Svar_DB::is_registered_id()