import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Scanner;

public class Main {
  
  public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } 
} import java.util.regex.Matcher; Matcher java.util.regex import java.util.regex.Pattern; Pattern java.util.regex import java.util.Scanner; Scanner java.util public class Main {
  
  public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } 
} Main public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } main {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String inputStr = sc.nextLine(); inputStr sc.nextLine() sc.nextLine sc String regex = "[7]"; regex "[7]" Pattern p = Pattern.compile(regex); p Pattern.compile(regex) Pattern.compile Pattern regex Matcher m = p.matcher(inputStr); m p.matcher(inputStr) p.matcher p inputStr if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } m.find() m.find m {
      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) {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } 
} public class Main {
  
  public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } 
} Main
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Scanner;

public class Main {
  
  public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
    String inputStr = sc.nextLine();
    
    String regex = "[7]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(inputStr);

    if (m.find()) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  
  } 
}