import java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sn = new Scanner(System.in);
        int N = sn.nextInt();
        if(N % 10 == 7){
            System.out.println("Yes");
        }else{
            N = N/10;
            if(N % 10 == 7){
                System.out.println("Yes");
            }else{
                N = N/10;
                if(N % 10 == 7){
                    System.out.println("Yes");
                }else{
                    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