import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	}
} import java.util.*; util.* java public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	} main {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) int n=in.nextInt(); n in.nextInt() in.nextInt in Set<Integer> set = new HashSet<>(); set new HashSet<>() while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		} n!=0 n 0 {
			set.add(n%10);
			n=n/10;
		} set.add(n%10) set.add set n%10 n 10 n=n/10 n n/10 n 10 if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		} set.contains(7)==true set.contains(7) set.contains set 7 true {
			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) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	}
} public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	}
} Main
import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int n=in.nextInt();
		Set<Integer> set = new HashSet<>();
		while(n!=0)
		{
			set.add(n%10);
			n=n/10;
		}
		if(set.contains(7)==true)
		{
			System.out.println("Yes");
		}
		else
		{
			System.out.println("No");
		}
	}
}