import java.util.*;
 
public class Main {
	public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
	}
} Main public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
	} main {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        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 for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        } {
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        } if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            } s.charAt(i) == '7' s.charAt(i) s.charAt s 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) throws Exception{
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
	}
} public class Main {
	public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
	}
} Main
import java.util.*;
 
public class Main {
	public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        for(int i = 0; i < s.length(); i++){
        	if(s.charAt(i) == '7'){
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
	}
}