Var a:integer;
begin
readln(a);
if a = 1
then write('I');
if a = 2
then write('II');
if a = 3
then write('III');
if a = 4
then write('IV');
if a = 5
then write('V');
if a = 6
then write('VI');
if a = 7
then write('VII');
if a = 8
then write('VIII');
if a = 9
then write('IX');
if a = 10
then write('X');
if a = 11
then write('XI');
if a = 12
then write('XII');
if a = 13
then write('XIII');
if a = 14
then write('XIV');
if a = 15
then write('XV');
end.