
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

     Scanner sc=new Scanner(System.in);
     int n=sc.nextInt();
     boolean flag=false;
     while(n>0)
     {
         if(n%10==7)
              flag=true;
         n/=10;

     }
     if(flag)
          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