import java.io.*;
import java.util.*;

public class Main{
    public static BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
    public static PrintWriter stdOut = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));
    public static void main(String[] args) throws IOException{
        String[] sp = stdIn.readLine().split(" ");
        long l = Long.parseLong(sp[0]); long r = Long.parseLong(sp[1]);
        long res = 0;
        for(long i = l; i <= r; i++) {
            if(new StringBuffer(i+"").indexOf("2022") != -1) res += i;
        }
        stdOut.println(res);
        stdOut.flush();
    }
}