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

int main() 
{
	char line[10001];
 	char chars[] = "mdclxvi";
	int numbers[] = {1000, 500, 100, 50, 10, 5, 1};
	int max_count[] = {10000, 1, 3, 1, 3, 1, 3};
	int len, lastpos, count;
	int num =0;
	while (!feof(stdin)) {
		line[0] = '\0';
		fgets(line, 10000, stdin);
		len = strlen(line);
		lastpos = 0;
		num = 0;
		for (unsigned c = 0; c < strlen(chars); c++) {
			count = 0;
			for (int pos = lastpos; pos < len; pos++) {
				if (line[pos] == chars[c] && count<max_count[c]) {
					count++;
					num += numbers[c];	
					lastpos = pos+1;
				}
			}
		}
		if (line[0] != '\0') printf("%d\n", num);
	}
	return 0;
}