program Project1;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var
  N, M, i, j, sveti, svetj: integer;
  Lab: array[1..1000,1..1000] of Char;

procedure svet_go(i, j, di, dj: integer);
var
  curi, curj: integer;
begin
if not ((Lab[i+di, j]='*') and (Lab[i, j+dj]='*')) then
  begin
  if (i+di>0) and (i+di<N+1) then curi:=i+di else begin curi:=i; di:=-di; end;
  if (j+dj>0) and (j+dj<M+1) then curj:=j+dj else begin curj:=j; dj:=-dj; end;
  if (Lab[curi, curj]<>'*') and (Lab[curi, curj]<>'X') then
        begin
        if (di*dj>0) and (Lab[curi, curj]='.') then Lab[curi, curj]:='\';
        if (di*dj>0) and (Lab[curi, curj]='/') then Lab[curi, curj]:='X';
        if (di*dj<0) and (Lab[curi, curj]='.') then Lab[curi, curj]:='/';
        if (di*dj<0) and (Lab[curi, curj]='\') then Lab[curi, curj]:='X';
        svet_go(curi, curj, di, dj);
        end;
  if Lab[curi, curj]='*' then begin
                              if (Lab[curi-di, curj]='*')  and (Lab[curi, curj-dj]<>'*') then
                                  begin
                                  curj:=curj-dj;
                                  dj:=-dj;
                                  if (di*dj>0) and (Lab[curi, curj]='.') then Lab[curi, curj]:='\';
                                  if (di*dj>0) and (Lab[curi, curj]='/') then Lab[curi, curj]:='X';
                                  if (di*dj<0) and (Lab[curi, curj]='.') then Lab[curi, curj]:='/';
                                  if (di*dj<0) and (Lab[curi, curj]='\') then Lab[curi, curj]:='X';
                                  svet_go(curi, curj, di, dj);
                                  end;
                              if (Lab[curi-di, curj]<>'*') and (Lab[curi, curj-dj]='*') then
                                  begin
                                  curi:=curi-di;
                                  di:=-di;
                                  if (di*dj>0) and (Lab[curi, curj]='.') then Lab[curi, curj]:='\';
                                  if (di*dj>0) and (Lab[curi, curj]='/') then Lab[curi, curj]:='X';
                                  if (di*dj<0) and (Lab[curi, curj]='.') then Lab[curi, curj]:='/';
                                  if (di*dj<0) and (Lab[curi, curj]='\') then Lab[curi, curj]:='X';
                                  svet_go(curi, curj, di, dj);
                                  end;
                              end;
  end;

end;

begin

readln(N, M);
for i:=1 to N do for j:=1 to M do begin
                                  if j<>M then read(Lab[i,j]) else readln(Lab[i,j]);
                                  if Lab[i,j]='X' then begin
                                                       sveti:=i;
                                                       svetj:=j;
                                                       end;
                                  end;

svet_go(sveti, svetj, 1, 1);
svet_go(sveti, svetj, 1, -1);
svet_go(sveti, svetj, -1, 1);
svet_go(sveti, svetj, -1, -1);


writeln;
for i:=1 to N do for j:=1 to M do if j<>M then write(Lab[i,j]) else writeln(Lab[i,j]);

readln;
end.