program prev_arab_rim;

uses crt;

var a : integer;
    b : string;

function rimsky(num:integer):string;
 var
  dif : integer;
  tmp : string;
 function sestav(tmp1,tmp2:integer; sym:string):string;
  var
   cnt: integer;
   poc: integer;
   ps : string;
  begin
   ps:='';
   dif:= tmp1 mod tmp2;
   poc:=tmp1 div tmp2;
   for cnt:= 1 to poc do ps:=ps+sym;
   sestav:=ps;
  end;
 begin
  tmp:=sestav(num,1000,'M');
  tmp:=tmp+sestav(dif,900,'CM');
  tmp:=tmp+sestav(dif,500,'D');
  tmp:=tmp+sestav(dif,400,'CD');
  tmp:=tmp+sestav(dif,100,'C');
  tmp:=tmp+sestav(dif,90,'XC');
  tmp:=tmp+sestav(dif,50,'L');
  tmp:=tmp+sestav(dif,40,'XL');
  tmp:=tmp+sestav(dif,10,'X');
  tmp:=tmp+sestav(dif,9,'IX');
  tmp:=tmp+sestav(dif,5,'V');
  tmp:=tmp+sestav(dif,4,'IV');
  tmp:=tmp+sestav(dif,1,'I');
  rimsky:=tmp;
end;

begin
  clrscr;
  readln(a);
  b:=rimsky(a);
  writeln(b);
  readln;
end.