import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String target = scanner.nextLine();
        boolean flag = false;
        for (int i = 0; i < target.length(); i++) {
            if (target.charAt(i) == '7') {
                flag = true;
                System.out.println("Yes");
                break;
            }
        }
        if (!flag) {
            System.out.println("No");
        }
    }
}
/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