#include <cstdlib>
#include <iostream>
#include <string>
#include <deque>
#include <vector>

using namespace std;

int main() {
  string line;
  deque<int,std::allocator<int> > dequ;
  dequ.push_back(100000);
  int value;
  while (getline(cin, line)) {
    for (int i=0;i<line.length();i++) {
      switch (line[i]) {
        case 'm': value=1000;
                  break;
        case 'd': value=500;
        break;
        case 'c': value=100;
        break;
        case 'l': value=50;
        break;
        case 'x': value=10;
        break;
        case 'v': value=5;
              break;
        case 'i': value=1;
        break;
        default: value=0;
        break;
      }
      if (value!=0) {
        while (dequ.front()<value) dequ.pop_front();
        dequ.push_front(value);
      }  
    }
    dequ.pop_back();
    int lastValue=0;
    long result = 0;
    while(dequ.back()==1000) {
      dequ.pop_back();
      result+=1000;
    } 
    if (dequ.back()==500) {
      dequ.pop_back();
      result+=500;
    }
    int support=0;
    while (dequ.back()==500) dequ.pop_back();
    while (dequ.back()==100) {
      dequ.pop_back();
      support+=100;
    }
    if (support>300) support=300;
    result+=support;
    if (dequ.back()==50) { 
      result+=50;
      dequ.pop_back();
    }
    while (dequ.back()==50) { dequ.pop_back(); }
    support=0;
    while (dequ.back()==10) { support+=10; dequ.pop_back(); }
    if (support>30) support=30;   
    result+=support;
    if (dequ.back()==5) { 
      result+=5;
      dequ.pop_back();
    }
    while (dequ.back()==5) { dequ.pop_back(); }
    support=0;
    while (dequ.back()==1) { support+=1; dequ.pop_back(); }
    if (support>3) support=3;   
    result+=support;
    
   cout << result << endl;
  }
  return 0;

}