import java.util.Scanner;

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