import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        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 String list[] = N.split(""); list N.split("") N.split N "" for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        } int i = 0; int i = 0; i 0 i < list.length i list.length list list.length i++ i++ i {
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        } {
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        } if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            } list[i].equals("7") list[i].equals list[i] list i "7" {
                System.out.println("Yes");
                return;
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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) throws Exception {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String N = sc.next();
        String list[] = N.split("");
        for(int i = 0; i < list.length; i++){
            if(list[i].equals("7")){
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
}
