public static void main ( String [ ] args ) throws Exception {
  BufferedReader input = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  StringTokenizer tokenizer = new StringTokenizer ( input . readLine ( ) ) ;
  int x = Integer . parseInt ( tokenizer . nextToken ( ) ) ;
  int y = Integer . parseInt ( tokenizer . nextToken ( ) ) ;
  StringBuilder firstAndLast = new StringBuilder ( ) ;
  for ( int i = 0 ;
  i < y + 2 ;
  i ++ ) {
    firstAndLast . append ( '#' ) ;
  }
  StringBuilder out = new StringBuilder ( ) ;
  out . append ( firstAndLast ) . append ( '\n' ) ;
  for ( int i = 0 ;
  i < x ;
  i ++ ) {
    out . append ( '#' ) . append ( input . readLine ( ) ) . append ( '#' ) . append ( '\n' ) ;
  }
  out . append ( firstAndLast ) . append ( '\n' ) ;
  System . out . print ( out ) ;
}

public static void main ( String [ ] args ) throws Exception { BufferedReader input = new BufferedReader ( new InputStreamReader ( System . in ) ) ; StringTokenizer tokenizer = new StringTokenizer ( input . readLine ( ) ) ; int x = Integer . parseInt ( tokenizer . nextToken ( ) ) ; int y = Integer . parseInt ( tokenizer . nextToken ( ) ) ; StringBuilder firstAndLast = new StringBuilder ( ) ; for ( int i = 0 ; i < y + 2 ; i ++ ) { firstAndLast . append ( ' # ' ) ; } StringBuilder out = new StringBuilder ( ) ; out . append ( firstAndLast ) . append ( ' \n ' ) ; for ( int i = 0 ; i < x ; i ++ ) { out . append ( ' # ' ) . append ( input . readLine ( ) ) . append ( ' # ' ) . append ( ' \n ' ) ; } out . append ( firstAndLast ) . append ( ' \n ' ) ; System . out . print ( out ) ; }
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