#include <stdio.h>
#include <strings.h>

int main()
{
  char s[11000];
  char s1[11000];
  int i, d, j, k;
  char c, ddd[2];
  int pm,pd,pc,pl,px,pv,pi;  

  while (!feof(stdin))
  {
    gets(s);
    s[10000]=0;
    d = strlen(s);
    s1[0] = '.';
    s1[1] = 0;
    ddd[1] = 0;
    for (i=1; i<=d; i++)
    { 
      c=s[i-1];
      if ((c=='m') || (c=='M') || (c=='c') || (c=='C') || (c=='L') || (c=='l') || (c=='X') || (c=='x') || (c=='V') || (c=='v') || (c=='i') || (c=='I') || (c=='d') || (c=='D'))
      {   
          ddd[0] = c; 
          strcat(s1,ddd); 
      }
    }  
    strcpy(s, s1);
    d=strlen(s);
    j=0;
    s1[0] = 0;
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='m') || (s[i]=='M'))
      {
        strcat(s1,"m");
	j=i;
      }
    }  
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='d') || (s[i]=='D'))
      {
        strcat(s1,"d");
	j=i;
      }
    }  
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='c') || (s[i]=='C'))
      {
        strcat(s1,"c");
	j=i;
      }
    }  
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='l') || (s[i]=='L'))
      {
        strcat(s1,"l");
	j=i;
      }
    }
      
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='x') || (s[i]=='X'))
      {
        strcat(s1,"x");
	j=i;
      }	
    }
      
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='v') || (s[i]=='V'))
      {
        strcat(s1,"v");
	j=i;
      }
    }  
    for (i=j+1; i<=d; i++)
    {
      if ((s[i]=='i') || (s[i]=='I'))
      {
        strcat(s1,"i");
	j=i;
      }
    }  
    d=strlen(s1);
    j=0;
    k=0;
    s=s1;
    pm=0;
    pd=0;
    pc=0;
    pl=0;
    px=0;
    pv=0;
    pi=0;
    for (i=1; i<=d; i++)
    {
      if (s[i]=='m')
      {
	  j=j+1000;
      } 
      else
      if (s[i]=='d')
      {
	if (pd<1) 
	  j=j+500;
	pd++;  
      }
      else
      if (s[i]=='c')
      {
	if (pc<3) 
	  j=j+100;
	pc++;  
      }
      else
      if (s[i]=='l')
      {
	if (pl<1) 
	  j=j+50;
	pl++;  
      }
      else
      if (s[i]=='x')
      {
	if (px<3) 
	  j=j+10;
	px++;  
      }
      else
      if (s[i]=='v')
      {
	if (pv<1) 
	  j=j+5;
	pv++;  
      }
      else
      if (s[i]=='i')
      {
	if (pi<3) 
	  j=j+1;
	pi++;  
      }
    }  
    printf("%d\n", j);      
  }
  return 0;
}