#include <bits/stdc++.h>

using namespace std;


int main() {

    int n;

    cin >> n;

    if (n % 10 == 7 || n % 100 == 7 || n % 1000 == 7) {
        cout << "Yes" << endl;
    } else {
        cout << "No" << endl;
    }

    return 0;
}
