import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.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 scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } 
    System.out.println("No");
    
  }
} Main public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } 
    System.out.println("No");
    
  } main {
    Scanner scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } 
    System.out.println("No");
    
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int a = scan.nextInt(); a scan.nextInt() scan.nextInt scan String b = a+""; b a+"" a "" for(int i=0; i<3; i++){
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } {
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      } b.charAt(i) == '7' b.charAt(i) b.charAt b 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 scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } 
    System.out.println("No");
    
  }
} public class Main{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.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 scan = new Scanner(System.in);
    int a = scan.nextInt();
    String b = a+"";
    for(int i=0; i<3; i++){
      if (b.charAt(i) == '7'){
        System.out.println("Yes");
        return;
      }
    } 
    System.out.println("No");
    
  }
}
