//

// main.cpp

// leetcode012

//

// Created by 萧天牧 on 17/2/23.

// Copyright © 2017年 萧天牧. All rights reserved.

//

#include <iostream>

using namespace std;

string intToRoman(int num) {

string roma = "MDCLXVI";

int roma_num[] = {1000, 500, 100, 50, 10, 5, 1};

string res;

for(int i = 0; i < num / 1000; i++)

res += "M";

num %= 1000;

if(num / 100 == 9){

res += "CM";

num -= 900;

}

else if (num >= 500)

{

res += "D";

num -= 500;

}

if (num / 100 == 4){

res += "CD";

num -= 400;

}

else

for (int i = 0; i < num / 100; i++)

res += "C";

num %= 100;

if(num / 10 == 9){

res += "XC";

num -= 90;

}

else if (num >= 50)

{

res += "L";

num -= 50;

}

if (num / 10 == 4){

res += "XL";

num -= 40;

}

else

for (int i = 0; i < num / 10; i++)

res += "X";

num %= 10;

if (num == 9){

res += "IX";

return res;

}

else if(num >= 5){

res += "V";

num -= 5;

}

if (num / 1 == 4){

res += "IV";

}

else{

for (int i = 0; i < num ; i++)

res += "I";

}

return res;

}

int main(int argc, const char * argv[]) {

int a;

while (cin >> a) {

cout << intToRoman(a) << endl;

}

}