#include <string>
#include <iostream>

using namespace std;

#define printx
#ifdef printx
#define o(a) cout << #a << ": " << a << endl
#else
#define o(a)
#endif

int main(void) {
  int i, num, len;
  char last, buf[10000];
  string s, x;

  
  while( gets(buf) != 0 ) {
    s = buf;
    x = "";
    len = s.length();
    for(i = 0; i < len; i++) {
      switch(s[i]) {
        case 'm' : case 'M' :
	  x += '6';
	  break;
        case 'd' : case 'D' :
	  x += '5';
	  break;
        case 'c' : case 'C' :
	  x += '4';
	  break;
        case 'l' : case 'L' :
	  x += '3';
	  break;
        case 'x' : case 'X' :
	  x += '2';
	  break;
        case 'v' : case 'V' :
	  x += '1';
	  break;
        case 'i' : case 'I' :
	  x += '0';
	  break;
      }
    }
    len = x.length();
    s = "";
    last = x[len - 1];
    for(i = len - 1; i >= 0; i--) {
      if(x[i] >= last) {
        last = x[i];
        s = last + s;
      }
    }

    len = s.length();
    num = 0;
    for(i = 0; i < len; i++) {
      switch(s[i]) {
        case '0':
	  num += 1;
	  break;
        case '1':
	  num += 5;
	  break;
        case '2':
	  num += 10;
	  break;
        case '3':
	  num += 50;
	  break;
        case '4':
	  num += 100;
	  break;
        case '5':
	  num += 500;
	  break;
        case '6':
	  num += 1000;
	  break;
      }
    }
    cout << num << endl;
    
  }


  return 0;
}