import java.util.*;
public class Main{
     public static void main(String []args){
         Scanner scan = new Scanner(System.in);
         int a = scan.nextInt();
         
         boolean flag = true;
         while ( a != 0 ){
            if ( a % 10 == 7 ){
                flag = false;
                break;
            }
            
            a/=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