import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String N = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			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 = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String N = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String N = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			System.out.println("Yes");
		} else {
			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 int count = 0; count 0 for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		} int i=0; int i=0; i 0 i < 3 i 3 i++ i++ i {
			if (N.charAt(i) == '7') {
				count++;
			}
		} {
			if (N.charAt(i) == '7') {
				count++;
			}
		} if (N.charAt(i) == '7') {
				count++;
			} N.charAt(i) == '7' N.charAt(i) N.charAt N i '7' {
				count++;
			} count++ count if (count > 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} count > 0 count 0 {
			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 = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			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 = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			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 = sc.next();
		int count = 0;
		for (int i=0; i < 3; i++) {
			if (N.charAt(i) == '7') {
				count++;
			}
		}
		if (count > 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}

}
