import java.util.*;

public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    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 N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    System.out.println("Yes");
      }else{
	System.out.println("No");
      }
      }
} Main public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    System.out.println("Yes");
      }else{
	System.out.println("No");
      }
      } main {
    
    Scanner sc = new Scanner(System.in);
    String N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    System.out.println("Yes");
      }else{
	System.out.println("No");
      }
      } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String N = sc.next(); N sc.next() sc.next sc char[]n = N.toCharArray(); n N.toCharArray() N.toCharArray N int cou = 0; cou 0 for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    } int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
      if(n[i]=='7'){
        cou++;
      }
    } {
      if(n[i]=='7'){
        cou++;
      }
    } if(n[i]=='7'){
        cou++;
      } n[i]=='7' n[i] n i '7' {
        cou++;
      } cou++ cou if(cou>0){
    System.out.println("Yes");
      }else{
	System.out.println("No");
      } cou>0 cou 0 {
    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 N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    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 N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    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 N = sc.next();
    char[]n = N.toCharArray();
    
    int cou = 0;
    for(int i=0; i<3; i++){
      if(n[i]=='7'){
        cou++;
      }
    }
    if(cou>0){
    System.out.println("Yes");
      }else{
	System.out.println("No");
      }
      }
}