import java.util.*;

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