import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
 
		String n = sc.next();
      
      for(int i = 0; i < 3; i++){
        if(n.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){
		Scanner sc = new Scanner(System.in);
 
		String n = sc.next();
      
      for(int i = 0; i < 3; i++){
        if(n.charAt(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();
      
      for(int i = 0; i < 3; i++){
        if(n.charAt(i) == '7'){
          System.out.println("Yes");
          return;
        }
      }
      	
      System.out.println("No");
	} main {
		Scanner sc = new Scanner(System.in);
 
		String n = sc.next();
      
      for(int i = 0; i < 3; i++){
        if(n.charAt(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 for(int i = 0; i < 3; i++){
        if(n.charAt(i) == '7'){
          System.out.println("Yes");
          return;
        }
      } int i = 0; int i = 0; i 0 i < 3 i 3 i++ i++ i {
        if(n.charAt(i) == '7'){
          System.out.println("Yes");
          return;
        }
      } {
        if(n.charAt(i) == '7'){
          System.out.println("Yes");
          return;
        }
      } if(n.charAt(i) == '7'){
          System.out.println("Yes");
          return;
        } n.charAt(i) == '7' n.charAt(i) n.charAt 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();
      
      for(int i = 0; i < 3; i++){
        if(n.charAt(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();
      
      for(int i = 0; i < 3; i++){
        if(n.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){
		Scanner sc = new Scanner(System.in);
 
		String n = sc.next();
      
      for(int i = 0; i < 3; i++){
        if(n.charAt(i) == '7'){
          System.out.println("Yes");
          return;
        }
      }
      	
      System.out.println("No");
	}
}