import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '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 A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '7'){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '7'){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    String A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '7'){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String A = sc.next(); A sc.next() sc.next sc char a = A.charAt(0); a A.charAt(0) A.charAt A 0 char b = A.charAt(1); b A.charAt(1) A.charAt A 1 char c = A.charAt(2); c A.charAt(2) A.charAt A 2 if(a== '7' || b== '7' || c== '7'){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    } a== '7' || b== '7' || c== '7' a== '7' || b== '7' || c== '7' a== '7' a '7' b== '7' b '7' c== '7' c '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 sc = new Scanner(System.in);
    String A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '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 A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '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 A = sc.next();
    char a = A.charAt(0);
    char b = A.charAt(1);
    char c = A.charAt(2);;
    if(a== '7' || b== '7' || c== '7'){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}

