import java.util.*;
class Main{
public static void main(String args[]){

        Scanner sc= new Scanner(System.in);
        char[] n = sc.nextLine().toCharArray();
        for(int i=0;i<3;i++){
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        }
        System.out.println("No");
    


}
} import java.util.*; util.* java class Main{
public static void main(String args[]){

        Scanner sc= new Scanner(System.in);
        char[] n = sc.nextLine().toCharArray();
        for(int i=0;i<3;i++){
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        }
        System.out.println("No");
    


}
} Main public static void main(String args[]){

        Scanner sc= new Scanner(System.in);
        char[] n = sc.nextLine().toCharArray();
        for(int i=0;i<3;i++){
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        }
        System.out.println("No");
    


} main {

        Scanner sc= new Scanner(System.in);
        char[] n = sc.nextLine().toCharArray();
        for(int i=0;i<3;i++){
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        }
        System.out.println("No");
    


} Scanner sc= new Scanner(System.in); sc new Scanner(System.in) char[] n = sc.nextLine().toCharArray(); n sc.nextLine().toCharArray() sc.nextLine().toCharArray sc.nextLine() sc.nextLine sc for(int i=0;i<3;i++){
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        } int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        } {
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        } if(n[i]=='7'){
                System.out.println("Yes");
                return;
            } n[i]=='7' n[i] n i '7' {
                System.out.println("Yes");
                return;
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; System.out.println("No") System.out.println System.out System System.out "No" String args[] args
import java.util.*;
class Main{
public static void main(String args[]){

        Scanner sc= new Scanner(System.in);
        char[] n = sc.nextLine().toCharArray();
        for(int i=0;i<3;i++){
            if(n[i]=='7'){
                System.out.println("Yes");
                return;
            }
            
        }
        System.out.println("No");
    


}
}