program Project5;
02
03  {$APPTYPE CONSOLE}
04
05  var
06    n, m, i, j: integer;
07    s: string;
08    a, b: array [0 .. 101, 0 .. 101] of integer;
09    busy: boolean;
10
11  begin
12     reset(input, 'input.txt');
13     rewrite(output, 'output.txt');
14    busy := true;
15    readln(n, m);
16    for i := 0 to n + 1 do
17      for j := 0 to m + 1 do
18      begin
19        a[i, j] := 1;
20        b[i, j] := 1;
21      end;
22    for i := 1 to n do
23    begin
24      readln(s);
25      for j := 1 to m do
26      begin
27        if s[j] = '#' then
28          a[i, j] := 1
29        else
30          a[i, j] := 0;
31        if a[i, j] = 0 then
32          busy := false;
33        b[i, j] := a[i, j];
34      end;
35    end;
36    if busy = false then
37      for i := 1 to n do
38        for j := 1 to m do
39        begin
40          if (b[i - 1, j] + b[i + 1, j] + b[i, j + 1] + b[i, j - 1] = 4) and
41            (a[i, j] = 1) then
42            a[i, j] := 0;
43        end;
44    for i := 1 to n do
45    begin
46      for j := 1 to m do
47        if a[i, j] = 1 then
48          write('#')
49        else
50          write('.');
51      writeln;
52    end;
53    //readln;
54
55  end.