import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    } main {
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String N = sc.next(); N sc.next() sc.next sc if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      } N.contains("7") N.contains N "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){
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      String N = sc.next();
      if(N.contains("7")){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
}