#include <stdio.h>

int main(void) {
	char line[10001];
	char* now;
	int last;
	int h;
	int c;
	int repeatlefts;
	
	while(gets(line)!=NULL) {
		c = 0;
		/*printf("%s", line);*/
		now = line;
		while(*now!='\0')
			now++;
		last=-1;
		repeatlefts = 0;
		while(now>=line) {
			switch (*now)
			{
				case 'i': h = 1; break;
				case 'v': h = 5; break;
				case 'x': h = 10; break;
				case 'l': h = 50; break;
				case 'c': h = 100; break;
				case 'd': h = 500; break;
				case 'm': h = 1000; break;
				default: h = 0;
			}
			
			if (h) {
				if (last<h) {
					c += h;
					switch (h) {
					case 1: repeatlefts = 3; break;
					case 5: repeatlefts = 1; break;
					case 10: repeatlefts = 3; break;
					case 50: repeatlefts = 1; break;
					case 100: repeatlefts = 3; break;
					case 500: repeatlefts = 1; break;
					case 1000: repeatlefts = -2; break;
					}
					repeatlefts--;
				} else if (last>h) {
					/* ignore */
				} else if (last==h) {
					if (repeatlefts) {
						c += h;
						if (repeatlefts>0)
							repeatlefts--;
					}
				}
				last = h;
			}
			now--;
		}
		printf("%d\n", c);
	}
	
	return 0;
}