import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         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);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
   }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
   } main {
		Scanner sc = new Scanner(System.in);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N=sc.nextInt(); N sc.nextInt() sc.nextInt sc boolean truth=false; truth false if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      } (N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7) (N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7) (N%1000>=700&&N%1000<=799) N%1000>=700 N%1000 N 1000 700 N%1000<=799 N%1000 N 1000 799 (N%100>=70&&N%100<=79) N%100>=70 N%100 N 100 70 N%100<=79 N%100 N 100 79 (N%10==7) N%10 N 10 7 {
         truth=true;
      } truth=true truth true if(truth){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      } truth {
         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);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
   }
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         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);

      int N=sc.nextInt();
      boolean truth=false;
      if((N%1000>=700&&N%1000<=799)||(N%100>=70&&N%100<=79)||(N%10==7)){
         truth=true;
      }
      if(truth){
         System.out.println("Yes");
      }else{
         System.out.println("No");
      }
   }
}
