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package mypackage;
import java.io.*;

public class ArabToRim{

    public static void main(String arg[]){
        String RimSym[] ={"I", "V", "X", "L","C","D","M"} ;
		
		
		String Arab = "";
        System.out.println("Input simbol");
        try {
			BufferedReader d = new BufferedReader(new InputStreamReader(System.in));
			Arab = d.readLine();  
        } catch  (IOException e) {
            System.out.println("Input ERROR");
        } 
		Arab = new StringBuilder(Arab).reverse().toString();
		String Rim = "";
		String rez = "";
		int n = 0;
		int c = 0;
		int i = 0;
		
		for(int k=Arab.length();k>0; --k){
			int s = Character.getNumericValue(Arab.charAt(c));
			rez = "";
		
			if (s<=3) {
				for (i=s; i>0; --i){
					rez=rez + RimSym[n];
				}
			}
			if (s==4) {
				rez=rez + RimSym[n]+RimSym[n+1];			
			}
			if (s==5) {
				rez=rez + RimSym[n+1];
			}
			if (s>=6) {
				if (s<9){
					rez=rez + RimSym[n+1];
					for (i=s-5; i>0; --i){
						rez=rez + RimSym[n];
					}
				}
			}
			if (s==9) {
				rez=rez + RimSym[n]+ RimSym[n+2];
			}	
			++c;
			n = n+2;
			Rim=rez+Rim;
			
			
		}
		System.out.println(Rim);		
    }
}