import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  }
} import java.util.Scanner; Scanner java.util public class Main {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  }
} Main public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  } main {
    Scanner input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  } Scanner input = new Scanner(System.in); input new Scanner(System.in) String num = input.nextLine(); num input.nextLine() input.nextLine input if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    } num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7' num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7' num.charAt(0) == '7' num.charAt(0) num.charAt num 0 '7' num.charAt(1) == '7' num.charAt(1) num.charAt num 1 '7' num.charAt(2) == '7' num.charAt(2) num.charAt num 2 '7' {
      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 input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  }
} public class Main {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  }
} Main
import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
  	String num = input.nextLine();
    if (num.charAt(0) == '7' || num.charAt(1) == '7' || num.charAt(2) == '7') {
      System.out.println("Yes");
    }
    else {
      System.out.println("No");
    }
  }
}