import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	}

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No"); s.contains("7") s.contains s "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" sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		String s = sc.next();
		if(s.contains("7"))
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	}

}