#include <iostream>

using namespace std;

int main() {
    int a, b;
    int sum=0;
    cin >> a >> b;
    for (int i = a; i <= b; ++i) {
        if (i % 7 ==0) {
            i++;
            cout << sum << ' ';
        }
    }
    return 0;
}

#include <iostream>

using namespace std;

int main() {
    int a, b;
    int number = 0;
    cin >> a >> b;
    for (int i = a; i <= b; i++) {
        if (i % 7 == 0) {
            number++;
            cout << i << ' ';
        }
    }

    cout << "n";
    cout << "number: " << number << "n";

    return 0;
}

int deltaA = (a % 7 == 0)? 0 : (7 - (a % 7));
int count = (b - (b % 7) - (a + deltaA)) / 7 + 1;
if (count < 0)
  count = 0;

a = a + 6 / 7 * 7;

b = b / 7 * 7;

n = (b - a) / 7 + 1;