import java.util.Scanner;

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

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.next();
        if (s.charAt(0)=='7'||s.charAt(1)=='7'||s.charAt(2)=='7'){
            System.out.println("Yes");
        }else {
            System.out.println("No");
        }
    }
}