import java.util.Scanner;
 
public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  }
} import java.util.Scanner; Scanner java.util public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  }
} Main public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  } main {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String N = sc.next(); N sc.next() sc.next sc System.out.println(N.contains("7") ? "Yes" : "No") System.out.println System.out System System.out N.contains("7") ? "Yes" : "No" N.contains("7") N.contains N "7" "Yes" "No" String args[] args public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  }
} public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  }
} Main
import java.util.Scanner;
 
public class Main {
  public static void main(String args[]) {
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    System.out.println(N.contains("7") ? "Yes" : "No");
  }
}