import java.util.*;
public class Main
{
  public static void main(String args[])
  {
    Scanner Sc=new Scanner(System.in);
    String s= Sc.next();
    if(s.contains("7"))
      System.out.println("Yes");
    else
      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 s= Sc.next();
    if(s.contains("7"))
      System.out.println("Yes");
    else
      System.out.println("No");
  }
} Main public static void main(String args[])
  {
    Scanner Sc=new Scanner(System.in);
    String s= Sc.next();
    if(s.contains("7"))
      System.out.println("Yes");
    else
      System.out.println("No");
  } main {
    Scanner Sc=new Scanner(System.in);
    String s= Sc.next();
    if(s.contains("7"))
      System.out.println("Yes");
    else
      System.out.println("No");
  } Scanner Sc=new Scanner(System.in); Sc new Scanner(System.in) String s= Sc.next(); s Sc.next() Sc.next Sc if(s.contains("7"))
      System.out.println("Yes");
    else
      System.out.println("No"); s.contains("7") s.contains s "7" System.out.println("Yes") System.out.println System.out System System.out "Yes" 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 s= Sc.next();
    if(s.contains("7"))
      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 s= Sc.next();
    if(s.contains("7"))
      System.out.println("Yes");
    else
      System.out.println("No");
  }
} Main
import java.util.*;
public class Main
{
  public static void main(String args[])
  {
    Scanner Sc=new Scanner(System.in);
    String s= Sc.next();
    if(s.contains("7"))
      System.out.println("Yes");
    else
      System.out.println("No");
  }
}
