#include <cstdio>
#include <iostream>
#include <cstring>
#include <algorithm>

using namespace std;

int main(){
    string a;
    cin >> a;
    for (int j=1; j<a.size(); j++){
        if (a[j]=='X' and (a[j+1]=='V' or a[j+1]=='I' or j==a.size()-1) and (a[j-1]=='L' or a[j-1]=='C')){swap(a[j],a[j-1]); if (j>2) j-=3;}
        else if (a[j]=='I' and j==a.size()-1 and (a[j-1]=='X' or a[j-1]=='V')){ swap(a[j],a[j-1]); if (j>2) j-=3;}
        }
    cout << a << endl;
    return 0;
}