#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define endl '\n'

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int L, R; cin >> L >> R;
    bool c = false, r = false, p = false;
    for (int i = L; i <= R; i++) {
        if (1 <= i <= 295) c = true;
        if (296 <= i <= 416) r = true;
        if (417 <= i <= 420) p = true;
    }
    int cnt = 0;
    if (c) cnt++;
    if (r) cnt++;
    if (p) cnt++;
    cout << cnt << endl;
}