#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX 50000

char line[MAX];
char line2[MAX];
char *l;
int sum;

int zpracuj(char co, int h, int m) {
  char *last=l;
  int cnt=0;
  for (char *ptr=l;*ptr;ptr++) {
    if ( (*ptr==co) && cnt<m) {
      sum+=h;
      last=ptr+1;
      cnt++;
    }
    if (cnt>=m) {
      if (co!='x' && co!='c') break;
      char str[3]="ix";
      if (co=='c') {str[0]='x';str[1]='c';}

      char *first=strchr(last,str[0]);
      if (!first) break;
      char *second=strchr(first+1,str[1]);
      if (!second) break;
      l=second+1;
      sum+=(str[0]=='i') ? 9 : 90;

      return 1;
    }
  }
  if (last) l=last;
  return 0;
}

int main(void) {

  while (fgets(line2,MAX,stdin)) {
    char *p=line2;
    char *n=line;
    while (*p) {
      if (*p=='m' || *p=='d' || *p=='l' || *p=='c' || *p=='x' || *p=='v' || *p=='i') *n++=*p;
      p++;
    }
    *n='\0';

    l=line;
    sum=0;

    zpracuj('m',1000,MAX);
    zpracuj('d',500,1);
    if (!zpracuj('c',100,3)) {
      zpracuj('l',50,1);
      if (!zpracuj('x',10,3)) {
	zpracuj('v',5,1);
	zpracuj('i',1,3);
      }
    } else {
      if (!zpracuj('x',10,0)) {
	zpracuj('v',5,1);
	zpracuj('i',1,3);
      }
    }

    printf("%d\n",sum);
  }

  return 0;
}