import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		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 = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		System.out.println("No");
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		System.out.println("No");
	} main {
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		System.out.println("No");
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String n = sc.next(); n sc.next() sc.next sc for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		} int i = 0; int i = 0; i 0 i < n.length() i n.length() n.length n ++i ++i i {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		} {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		} if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			} n.charAt(i) == '7' n.charAt(i) n.charAt n i '7' {
				System.out.println("Yes");
				return;
			} System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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 = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		System.out.println("No");
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		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 = sc.next();
		for (int i = 0; i < n.length(); ++i) {
			if (n.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}

		System.out.println("No");
	}

}
