/*
	arabic.java
	(c)1999 A.Matsuda 
*/
import	java.awt.*;
import	java.awt.event.*;
import	java.awt.Toolkit.*;
import	java.applet.*;
import	java.util.*;
import	java.lang.*;
import	java.text.*;
import	java.lang.System.*;

public class arabic
{
	static final char delimiter = (char)-1;
	class elem{
		char c;
		int v;
		public elem(char c, int v){
			this.c = c;
			this.v = v;
		}
		public char getChar()
		{
			return c;
		}
		public int getVal()
		{
			return v;
		}
	};
	elem tbl[]={
		new arabic.elem( 'm', 1000 ),
		new elem( 'd',  500 ),
		new elem( 'c',  100 ),
		new elem( 'l',   50 ),
		new elem( 'x',   10 ),
		new elem( 'v',    5 ),
		new elem( 'i',    1 ),
		new elem(  delimiter  , -1 ),
	};
	boolean chkv( char c )
	{
		int i;
		for( i = 0 ; ; i++ ){
			if( tbl[i].getChar() == delimiter ){
				break;
			}
			if( tbl[i].getChar() == c ){
				return true;
			}
		}
		return false;
	}
	int getv( char c )
	{
		int i;
		for( i = 0 ; ; i++ ){
			if( tbl[i].getChar() == (char)-1 ){
				break;
			}
			if( c == tbl[i].getChar() ){
				return tbl[i].getVal();
			}
		}
		return -1;
	}

	int arabic( String buf ) throws Exception
	{
		int prev = 0;
		int current = 0;
		int i;
		int val = 0;
		int cnt = 0;
 		
		buf.trim();
		buf = buf.toLowerCase();
		
		for( i = 0 ; i < buf.length() ; i ++ ){
			if( chkv( buf.charAt( i ) ) == true ){
				current = getv( buf.charAt( i ) );

				if( prev == current){
					cnt++;
				}
				else{
					if( prev < current && cnt >= 1 ){
						//２回以上引かれる数より小さな数が続いた後に減算を行う事はない
						throw new Exception("書式が不正です");
					}
					cnt = 0;
				}
				if( current > prev && prev != 0 ){
					if( prev * 5 != current && prev * 10 != current ){
						throw new Exception("書式が不正です");
					}
					if(  prev == 5 || prev == 50 || prev == 500 ){
						throw new Exception("書式が不正です");
					}
					val -= prev * 2;
					val += current;
					prev = current - prev;
				}
				else{
					//一度減算をおこなったら、currentよりも小さな値であるべき
					if( prev != 0 && ( ( ( prev % 9 ) == 0 ) && ( ( prev / 9 ) <= current) ) ) {
						throw new Exception("書式が不正です");
					}
					if( prev != 0 && ( prev == 4 || prev == 40 || prev == 400 ) && ( (prev / 4) <= current ) ){	//減算が行われた直後に同じ桁の数は並ばない。
						throw new Exception("書式が不正です");
					}
					if( ( prev == 5 || prev == 50 || prev == 500 ) && (cnt >= 1 ) ){
						throw new Exception("書式が不正です");
					}
					
					val += current;
					prev = current;
				}
			}
			else{
				throw new Exception("不正な文字が含まれています");
			}
		}
		
		return val;
	}

	public static void main( String arg[] )
	{
		int i;
		int val;
		arabic arabic = new arabic();
		
		for( i = 0 ; i < arg.length ; i++ ){
			try{
				val = arabic.arabic( arg[ i ] );
			}
			catch( Exception e ){
				System.out.println( e.getMessage() );
				continue;
			}
			System.out.println( arg[i] + "-->" + new Integer(val).toString() );
		}
	};
};