import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        
        String strnum = String.valueOf(a);
        //System.out.println("strnum : " + strnum); 
            if (strnum.contains("7"))
            {
                System.out.println("Yes");
            }else{
                System.out.println("No");
            }      
        //System.out.println(a);
        
        //int b = sc.nextInt();

        //System.out.println(String.format("%d",(int)temp));
        
        /*
        if ((a * b) % 2 == 0)
            System.out.println("Even");
        else
            System.out.println("Odd");
        */
    }
}
/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