#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, t) for (ll i = s; i < (ll)(t); i++)
#define all(x) begin(x), end(x)

template <class T> bool chmin(T& x, T y) {
	return x > y ? (x = y, true) : false;
}
template <class T> bool chmax(T& x, T y) {
	return x < y ? (x = y, true) : false;
}

struct io_setup {
	io_setup() {
		ios::sync_with_stdio(false);
		cin.tie(nullptr);
		cout << fixed << setprecision(15);
	}
} io_setup;

void solve() {
	int l, r;
	cin >> l >> r;
	auto f = [&](int x) {
		if (x >= 417) return 3;
		if (x >= 296) return 2;
		return 1;
	};
	cout << f(r) - f(l) << "\n";
}

int main() {
	int t = 1;
	// cin >> t;
	while (t--) solve();
}