#include <bits/stdc++.h>
using namespace std;

int a, b, ans;
int v[] = {6, 2, 5, 5, 4, 5, 6, 3, 7, 6};

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> a >> b;
    for(int i=a;i<=b;i++) for(char j : to_string(i)) ans += v[int(j -'0')];
    cout << ans << endl;
    return EXIT_SUCCESS;
}