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

public class Main{
  static Integer arr[];
  static int b[];
  static class FastReader{
    StringTokenizer st;
    BufferedReader in;
    public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    }
    
    String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }
    
    int nextInt(){
      return Integer.parseInt(next());
    }
    
    long nextLong(){
      return Long.parseLong(next());
    }
    
    double nextDouble(){
      return Double.parseDouble(next());
    }
    
    String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    }
  }
  
  public static void main(String[] args){
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.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 import java.util.StringTokenizer; StringTokenizer java.util public class Main{
  static Integer arr[];
  static int b[];
  static class FastReader{
    StringTokenizer st;
    BufferedReader in;
    public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    }
    
    String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }
    
    int nextInt(){
      return Integer.parseInt(next());
    }
    
    long nextLong(){
      return Long.parseLong(next());
    }
    
    double nextDouble(){
      return Double.parseDouble(next());
    }
    
    String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    }
  }
  
  public static void main(String[] args){
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.contains("7"))
    {
      System.out.println("Yes");
    }else System.out.println("No");
    
  }
} Main static Integer arr[]; arr static int b[]; b public static void main(String[] args){
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.contains("7"))
    {
      System.out.println("Yes");
    }else System.out.println("No");
    
  } main {
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.contains("7"))
    {
      System.out.println("Yes");
    }else System.out.println("No");
    
  } FastReader sc = new FastReader(); sc new FastReader() 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("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 static class FastReader{
    StringTokenizer st;
    BufferedReader in;
    public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    }
    
    String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }
    
    int nextInt(){
      return Integer.parseInt(next());
    }
    
    long nextLong(){
      return Long.parseLong(next());
    }
    
    double nextDouble(){
      return Double.parseDouble(next());
    }
    
    String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    }
  } FastReader StringTokenizer st; st BufferedReader in; in public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    } FastReader {
    in = new BufferedReader(new InputStreamReader(System.in));
    } in = new BufferedReader(new InputStreamReader(System.in)) in new BufferedReader(new InputStreamReader(System.in)) String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    } next {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    } while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      } st == null|| !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      } try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        } catch(IOException e) {
          e.printStackTrace();
        } IOException e {
          e.printStackTrace();
        } e.printStackTrace() e.printStackTrace e {
          st = new StringTokenizer(in.readLine());
        } st = new StringTokenizer(in.readLine()) st new StringTokenizer(in.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt(){
      return Integer.parseInt(next());
    } nextInt {
      return Integer.parseInt(next());
    } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong(){
      return Long.parseLong(next());
    } nextLong {
      return Long.parseLong(next());
    } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble(){
      return Double.parseDouble(next());
    } nextDouble {
      return Double.parseDouble(next());
    } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    } nextLine {
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    } String str = ""; str "" try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      } catch(IOException e){
        e.printStackTrace();
      } IOException e {
        e.printStackTrace();
      } e.printStackTrace() e.printStackTrace e {
        str = in.readLine();
      } str = in.readLine() str in.readLine() in.readLine in return str; str public class Main{
  static Integer arr[];
  static int b[];
  static class FastReader{
    StringTokenizer st;
    BufferedReader in;
    public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    }
    
    String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }
    
    int nextInt(){
      return Integer.parseInt(next());
    }
    
    long nextLong(){
      return Long.parseLong(next());
    }
    
    double nextDouble(){
      return Double.parseDouble(next());
    }
    
    String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    }
  }
  
  public static void main(String[] args){
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.contains("7"))
    {
      System.out.println("Yes");
    }else System.out.println("No");
    
  }
} public class Main{
  static Integer arr[];
  static int b[];
  static class FastReader{
    StringTokenizer st;
    BufferedReader in;
    public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    }
    
    String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }
    
    int nextInt(){
      return Integer.parseInt(next());
    }
    
    long nextLong(){
      return Long.parseLong(next());
    }
    
    double nextDouble(){
      return Double.parseDouble(next());
    }
    
    String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    }
  }
  
  public static void main(String[] args){
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.contains("7"))
    {
      System.out.println("Yes");
    }else System.out.println("No");
    
  }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main{
  static Integer arr[];
  static int b[];
  static class FastReader{
    StringTokenizer st;
    BufferedReader in;
    public FastReader() {
    in = new BufferedReader(new InputStreamReader(System.in));
    }
    
    String next() {
      while (st == null|| !st.hasMoreElements()) {
        try {
          st = new StringTokenizer(in.readLine());
        } catch(IOException e) {
          e.printStackTrace();
        }
      }
      return st.nextToken();
    }
    
    int nextInt(){
      return Integer.parseInt(next());
    }
    
    long nextLong(){
      return Long.parseLong(next());
    }
    
    double nextDouble(){
      return Double.parseDouble(next());
    }
    
    String nextLine(){
      String str = "";
      try {
        str = in.readLine();
      } catch(IOException e){
        e.printStackTrace();
      }
      return str;
    }
  }
  
  public static void main(String[] args){
    FastReader sc = new FastReader();
    String s = sc.next();
    if(s.contains("7"))
    {
      System.out.println("Yes");
    }else System.out.println("No");
    
  }
}