import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.HashMap;

public class Main {
    public static void main(String[] args){
        try{
            BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
            String  t=br.readLine();
            boolean ff=false;
            for(int i=0;i<t.length();i++){
                if(t.charAt(i)=='7'){
                    ff=true;
                }
            }
            if(ff){
                System.out.println("Yes");
            }else{
                System.out.println("No");
            }
        }catch(Exception e){
            System.out.println("KKKK "+e.getMessage());
        }
    }
}

/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