#include<iostream>


using namespace std;


int main()  
{
    string str;
    int i;
    cin>>str;
    for (i=0;i<=str.size();i++)
        {
         if ((str[i] == 'L') && (str[i+1] == 'X') && (str[i+2] != 'X'))
            {
            swap(str[i],str[i+1]);
            break;
        }
         if ((str[i] == 'L') && (str[i+1] == 'I') && (str[i+2] != 'I'))
            {
            swap(str[i],str[i+1]);
            break;
        }
       
        if ((str[i] == 'X') && (str[i+1] == 'I') && (str[i+2] != 'I'))
            {
            swap(str[i],str[i+1]);
            break;
        }
       
        if ((str[i] == 'V') && (str[i+1] == 'I') && (str[i+2] != 'I'))
            {
            swap(str[i],str[i+1]);
            break;
        }
        
        }
         cout<<str<<endl;   
        //system("pause");
        return 0;
    }