#include <iostream>
#include <string>
using namespace std;

int main(){ 
	       string s;
		   cin>>s;
		   if(s=="I" || s=="V" || s=="X" || s=="L" || s=="C" || s=="II" || s=="III" || s=="IV" || s=="VI" || s=="VII" || 
			   s=="VIII" || s=="IX" || s=="X"|| s=="XX" || s=="XX" || s=="XXX" || s=="XL" || s=="L" || s=="LX" || s=="LXX" || 
			   s=="LXXX" || s=="XC" )
		   
		   cout<<s;
		   else if(s=="VI") 
           
		   cout<<"IV";
		   else if(s=="XI") 
           
		   cout<<"IX";
		   else if(s=="XVI") 
           
		   cout<<"XIV";
		   else if(s=="XXI") 
           
		   cout<<"XIX";
		   else if(s=="LX") 
           
		   cout<<"XL";
		   

		   return 0;
          }