#include<iostream>
#include<stdio.h>
#include<cmath>
#include<cstring>
#include<string>
#include<algorithm>
#include<iomanip>
using namespace std;

int main(){
    string unos;
    cin >> unos;
    string jedinica="",desetica="";
    for (int i=0;i<unos.size();i++){
        if (unos[i]=='I' || unos[i]=='V') break;
        desetica+=unos[i];
        }
        
    for (int i=desetica.size();i<unos.size();i++){
        jedinica+=unos[i];
        }
    if (desetica == "LX") desetica = "XL";
    if (jedinica == "VI") jedinica = "IV";
    string rjes = desetica + jedinica;
    if (rjes == "XI") rjes = "IX";
    if (rjes == "XXI") rjes = "XIX";
    if (rjes == "XXXI") rjes = "XXIX";
    if (rjes == "LXI") rjes = "LIX";
    if (rjes == "LXXI") rjes = "LXIX";
    if (rjes == "LXXXI") rjes = "LXXIX";
    cout<<rjes;
    return 0;
}