#include<bits/stdc++.h>
using namespace std;
int main(){
    int a[15]={1,22,122,212,221,333,1333,3133,3313,3331,4444};
    int l,r,sum=0;
    cin>>l>>r;
    for(int i=1;i<=10;i++){
        if(a[i]>=l and a[i]<=r){
            sum+=a[i];
        }
    }
    cout<<sum;
    return 0;
}