uses crt,dos,objects;

type ps=^string;

var regs:Registers;l:ptrrec;

procedure clrscr;
 begin regs.ax:=3;
       intr($10,regs);end;

procedure readln(p:ps);
   begin l:=ptrrec(p);
   with regs do begin ah:=$3f;
         bx:=0;cx:=80;
         ds:=l.seg;dx:=l.ofs+1;
         msdos(regs);
         p^[0]:=chr(ax-2) end; end;

procedure  write(p:ps);
   begin l:=ptrrec(p);
   with regs do begin ah:=$40;
     bx:=1;cx:=length(p^);
      ds:=l.seg;dx:=l.ofs+1;
         msdos(regs);end;end;

procedure writeln(p:ps);
    var e:ps;
    begin new(e);e^:=#10#13;
    write(p);write(e) end;

function readkey:char;
         begin with regs do begin
         ah:=8;msdos(regs);
         readkey:=chr(al) end end;
procedure putc(c:char);
         begin with regs do begin
         ah:=2;dl:=ord(c);
         msdos(regs);end end;

var p,s,e,st,s2:ps;
i:integer;
b:char;
k:integer;
Begin
      clrscr;new(e);e^:=#10#13;
      new(p);new(s);p^:='Введите слово, по нажатию ввода конец. ';
      new(st);new(s2);
      b:='0';
      s2^:='';
      write(p);
      repeat st^:=st^+b;
      b:=readkey;
      if b=#13 then break;
      putc('*');
      until false;
      clrscr;
      for i:=2 to length(st^)+1 do s2^:=s2^+('*');
      p^:='Введите буквы для выхода нажмите ввод ';
      write(p);
      write(s2);
      repeat b:=readkey;
      if b=#13 then break;
      if pos(b,st^)>0 then begin
      clrscr;
      s2^[pos(b,st^)]:=b;
      write (p);
      write (s2);
      end;
      until false;
      end.