#include <iostream>
#include <map>
using namespace std;

int main(void) {
	long num, tmp;
	char c,l;
	map< char, int > number, pos;

	number['i'] = 1; pos['i'] = 1;
	number['v'] = 5; pos['v'] = 2;
	number['x'] = 10; pos['x'] = 3;
	number['l'] = 50; pos['l'] = 4;
	number['c'] = 100; pos['c'] = 5;
	number['d'] = 500; pos['d'] = 6;
	number['m'] = 1000; pos['m'] = 7;
	number[0] = 10000;

	num = tmp = 0;
	c = l = 0;
	while( !cin.eof() ) {
		c = cin.get();
		c = tolower( c );
		if( number[c] ) {
			if( c == l )
				tmp += number[c];
			else {
				if( number[c] < number[l] ) {
					num += tmp;
					tmp = number[c];
				}
				if( number[c] > number[l] ) {
					if( ( pos[c] - pos[l] ) <= 2 ) {
						num += ( number[c] - tmp );
						tmp = 0;
					} else {
						tmp = number[c];
					}
				}
				l = c;
			}
		}
		if( c == '\n' ) {
			num += tmp;
			cout << num << endl;
			num = tmp = 0;
			c = l = 0;
		}
	}
}