import java.util.Scanner;

public class Main {
    public static void main(String[] args){

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    }

} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args){

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    }

} Main public static void main(String[] args){

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    } main {

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    } boolean enable=false; enable false Scanner sc=new Scanner(System.in); sc new Scanner(System.in) String s=sc.next(); s sc.next() sc.next sc if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        } s.contains("7") s.contains s "7" {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");  
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
    public static void main(String[] args){

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    }

} public class Main {
    public static void main(String[] args){

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    }

} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args){

        boolean enable=false;
        Scanner sc=new Scanner(System.in);
        String s=sc.next();
        if(s.contains("7")){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");  
        }
        
    }

}