import java.util.*;
 
public class Main {
  private static String solve(int in) {
    while (in > 0) {
      if(in % 10 == 7)
        return "Yes";
      in = in / 10;
    }
    return "No";
  }
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int in = sc.nextInt();
    sc.close();
    System.out.println(solve(in));
  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz