import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if (n.indexOf('7') >= 0) {
            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) {

        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if (n.indexOf('7') >= 0) {
            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.indexOf('7') >= 0) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    } main {

        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if (n.indexOf('7') >= 0) {
            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.indexOf('7') >= 0) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        } n.indexOf('7') >= 0 n.indexOf('7') n.indexOf n '7' 0 {
            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.indexOf('7') >= 0) {
            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.indexOf('7') >= 0) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if (n.indexOf('7') >= 0) {
            System.out.println("Yes");
        }
        else {
            System.out.println("No");
        }
    }
}