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

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