import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			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) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}

	}

} Main public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}

	} main {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}

	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String str = scanner.next(); str scanner.next() scanner.next scanner if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		} str.contains("7") str.contains str "7" {
			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) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}

	}

} public class Main {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}

	}

} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		String str = scanner.next();
		if(str.contains("7")){
			System.out.println("Yes");
		}
		else{
			System.out.println("No");
		}

	}

}
