import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  }
} import java.util.*; util.* java public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc String ans = "No"; ans "No" for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    } int i = 0; int i = 0; i 0 i < 3 i 3 i++ i++ i {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    } {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    } int d = n % 10; d n % 10 n 10 n /= 10 n 10 if(d == 7) ans = "Yes"; d == 7 d 7 ans = "Yes" ans "Yes" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  }
} Main
import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String ans = "No";
    for(int i = 0; i < 3; i++) {
      int d = n % 10;
      n /= 10;
      if(d == 7) ans = "Yes";
    }
    System.out.println(ans);
  }
}