import java.util.Scanner;

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