import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  }
} Main public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  } main {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str = br.readLine(); str br.readLine() br.readLine br if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } str.contains("7") str.contains str "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) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  }
} public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str = br.readLine();
    
    if (str.contains("7")) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    } 
  }
}
