import java.util.Scanner;

public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    String a = sc.next();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      System.out.println("Yes");
    }else{
      System.out.println("No");      
    }
  }
} import java.util.Scanner; Scanner java.util public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    String a = sc.next();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      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();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      System.out.println("Yes");
    }else{
      System.out.println("No");      
    }
  } main {
    Scanner sc = new Scanner(System.in);
    String a = sc.next();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      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 int len = a.length(); len a.length() a.length a char[] b = a.toCharArray(); b a.toCharArray() a.toCharArray a boolean ans = false; ans false for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    } int i = 0; int i = 0; i 0 i < len i len i++ i++ i {
      if(b[i] == '7'){
        ans = true;
      }
    } {
      if(b[i] == '7'){
        ans = true;
      }
    } if(b[i] == '7'){
        ans = true;
      } b[i] == '7' b[i] b i '7' {
        ans = true;
      } ans = true ans true if(ans){
      System.out.println("Yes");
    }else{
      System.out.println("No");      
    } ans {
      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();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      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();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      System.out.println("Yes");
    }else{
      System.out.println("No");      
    }
  }
} Main
import java.util.Scanner;

public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    String a = sc.next();
    int len = a.length();
    char[] b = a.toCharArray();
    boolean ans = false; 
    for(int i = 0;i < len;i++){
      if(b[i] == '7'){
        ans = true;
      }
    }
    if(ans){
      System.out.println("Yes");
    }else{
      System.out.println("No");      
    }
  }
}