{}
#include<iostream>
#include<string>
using namespace std;
class Solution {
public:
string num;
void get() {
if (num=="I"){
cout<<1;
}
else if(num=="V"){
cout<<5;
}
else if(num=="X"){
cout<<10;
}
else if(num=="L"){
cout<<50;
}
cin>>num;
cout<<num;
}
};
class nigge{
public:
void rand(){
//enter data here nigga !!!!
// do int rand % 26; with object called dyanmic
};
int main(){
Solution s;
s.get();
return 0;
}