import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        if (sc.nextLine().indexOf('7') != -1) {
            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);
        if (sc.nextLine().indexOf('7') != -1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        if (sc.nextLine().indexOf('7') != -1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        if (sc.nextLine().indexOf('7') != -1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) if (sc.nextLine().indexOf('7') != -1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } sc.nextLine().indexOf('7') != -1 sc.nextLine().indexOf('7') sc.nextLine().indexOf sc.nextLine() sc.nextLine sc '7' -1 1 {
            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);
        if (sc.nextLine().indexOf('7') != -1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        if (sc.nextLine().indexOf('7') != -1) {
            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);
        if (sc.nextLine().indexOf('7') != -1) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}