#include<iostream>
using namespace std;

int tran(int x, int s) {
	int sum = 0;
	while (x>0) {
		sum += x % s;
		x /= s;
	}
	return sum;
}

bool fun(int i) {
	return tran(i, 4) == tran(i, 8);
}

int main() {
	int l, r;
	cin >> l >> r;

	int count = 0;
	for (int i = l; i <= r; ++i) {
		if (fun(i)) {
			count += 1;
		}
	}
	cout << count << endl;
	return 0;
}