import java.util.*;

public class Main{

	public static void main(String[] args){

		Scanner sc = new Scanner(System.in);
        String N = sc.next();
        char[] n = N.toCharArray();
      
        for(int i = 0; i < n.length; i++){
          if(n[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){

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

		Scanner sc = new Scanner(System.in);
        String N = sc.next();
        char[] n = N.toCharArray();
      
        for(int i = 0; i < n.length; i++){
          if(n[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 char[] n = N.toCharArray(); n N.toCharArray() N.toCharArray N for(int i = 0; i < n.length; i++){
          if(n[i] == '7'){
            System.out.println("Yes");
            return;
          }
        } int i = 0; int i = 0; i 0 i < n.length i n.length n n.length i++ i++ i {
          if(n[i] == '7'){
            System.out.println("Yes");
            return;
          }
        } {
          if(n[i] == '7'){
            System.out.println("Yes");
            return;
          }
        } if(n[i] == '7'){
            System.out.println("Yes");
            return;
          } n[i] == '7' n[i] 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();
        char[] n = N.toCharArray();
      
        for(int i = 0; i < n.length; i++){
          if(n[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();
        char[] n = N.toCharArray();
      
        for(int i = 0; i < n.length; i++){
          if(n[i] == '7'){
            System.out.println("Yes");
            return;
          }
        }
        System.out.println("No");
	}
} Main
import java.util.*;

public class Main{

	public static void main(String[] args){

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