#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define dunk(n) cout << n << endl
#define all(a) (a).begin(),(a).end()
int main() {
    string n;
    cin >> n;
    if(n[0] == 7 || n[1] == 7 || n[2] == 7) dunk("Yes");
    else dunk("Yes");
    return 0;
}