import java.util.*;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s= sc.next();
		if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s= sc.next();
		if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s= sc.next();
		if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	} main {
		Scanner sc = new Scanner(System.in);
		String s= sc.next();
		if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s= sc.next(); s sc.next() sc.next sc if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} s.indexOf("7")!=-1 s.indexOf("7") s.indexOf s "7" -1 1 {
			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 s= sc.next();
		if(s.indexOf("7")!=-1) {
			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 s= sc.next();
		if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s= sc.next();
		if(s.indexOf("7")!=-1) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}


	}

}
