#include<bits/stdc++.h>
using namespace std;


int main()
{
    string a;
    vector<char>b;
    long long int sum=0,i,j,k;
    while(cin>>a)
    {
         b.clear();
        if(a[0]>='A'&&a[0]<='Z')
        {
            sum=0;
            for(i=a.size()-1;i>=0;i--)
            {
                if(a[i]=='V')
                    sum+=5;
                else if(a[i]=='I')
                {
                    if(a[i+1]=='V'||a[i+1]=='X')
                        sum-=1;
                    else
                        sum+=1;
                }
                else if(a[i]=='X')
                {
                    if(a[i+1]=='L'||a[i+1]=='C')
                        sum-=10;
                    else
                        sum+=10;
                }
                else if(a[i]=='C')
                {
                    if(a[i+1]=='D'||a[i+1]=='M')
                        sum-=100;
                    else
                        sum+=100;
                }
                else if(a[i]=='L')
                    sum+=50;
                else if(a[i]=='D')
                    sum+=500;
                else if(a[i]=='M')
                    sum+=1000;
            }
            cout<<sum<<endl;
        }

        else if(a[0]>='1'&&a[0]<='9')
        {
            long long int c=stoi(a);
            j=0;
            while(c>0)
            {
                if(c>=1000)
                {
                    c-=1000;
                    b.push_back('M');
                }
                else if(c>=900)
                {
                    c-=900;
                    b.push_back('C');
                    b.push_back('M');

                }
                else if(c>=500)
                {
                    c-=500;
                    b.push_back('D');
                }
                else if(c>=400)
                {
                    c-=400;
                    b.push_back('C');
                    b.push_back('D');

                }
                else if(c>=100)
                {
                    c-=100;
                    b.push_back('C');
                }
                else if(c>=90)
                {
                    c-=90;
                    b.push_back('X');
                    b.push_back('C');
                }
                else if(c>=50)
                {
                    c-=50;
                    b.push_back('L');
                }
                else if(c>=40)
                {
                    c-=40;
                    b.push_back('X');
                    b.push_back('L');
                }
                else if(c>=10)
                {
                    c-=10;
                    b.push_back('X');
                }
                else if(c>=9)
                {
                    c-=9;
                    b.push_back('I');
                    b.push_back('X');
                }
                else if(c>=5)
                {
                    c-=5;
                    b.push_back('V');
                }
                else if(c>=4)
                {
                    c-=4;
                    b.push_back('I');
                    b.push_back('V');
                }
                else if(c>=1)
                {
                    c-=1;
                    b.push_back('I');
                }

            }
            for(i=0;i<b.size();i++)
                cout<<b[i];
            cout<<endl;
        }
    }
    return 0;
}