import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	}

} Main public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	} main {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	} try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		} {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		} Scanner sc = new Scanner(System.in) Scanner sc = new Scanner(System.in) new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc System.out.println(s.contains("7") ? "Yes" : "No") System.out.println System.out System System.out s.contains("7") ? "Yes" : "No" s.contains("7") s.contains s "7" "Yes" "No" String[] args args public class Main {

	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	}

} public class Main {

	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)) {
			String s = sc.next();
			System.out.println(s.contains("7") ? "Yes" : "No");
		}
	}

}