#include <iostream>

long sum;
char * poz;

using namespace std;

char * charpos(char * ret, char ch)
{
  while(*ret != '\0' && *ret != ch)
    ret++;
  return *ret == ch ? ret : NULL;
}

void najdi(char ch, int maxnum, int value)
{
  //cout << "Hladam ..." << endl;
  char * pch = charpos(poz, ch);
  int num = 0;
  while (pch != NULL && num < maxnum)
  {
    ++num;
    sum += value;
    poz = pch + 1;
    pch = charpos(poz, ch);
  }
}


int main (void) {
 
  char line[10004];
  
  while (cin.getline(line, 10001)) 
  {
    //cout << line << endl;
    sum = 0;
    poz = line;


    najdi('m', 10002, 1000);
    najdi('d', 1, 500);
    najdi('c', 3, 100);
    najdi('l', 1, 50);
    najdi('x', 3, 10);
    najdi('v', 1, 5);
    najdi('i', 3, 1);

    cout << sum << endl;
  }

  return  0;
}