import java.util.Scanner;
public class Main{

    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    }
} import java.util.Scanner; Scanner java.util public class Main{

    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    }
} Main public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    } main {

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes"); s.indexOf('7') == -1 s.indexOf('7') s.indexOf s '7' -1 1 System.out.print("No") System.out.print System.out System System.out "No" System.out.print("Yes") System.out.print System.out System System.out "Yes" String[] args args public class Main{

    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    }
} public class Main{

    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    }
} Main
import java.util.Scanner;
public class Main{

    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        if (s.indexOf('7') == -1)
            System.out.print("No");
        else
            System.out.print("Yes");
    }
}