import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        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 s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        System.out.println("No");
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc char c[] = new char[s.length()]; c new char[s.length()] s.length() s.length s for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        } {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        } c[i] = s.charAt(i) c[i] c i s.charAt(i) s.charAt s i if('7' == c[i]) {
                System.out.println("Yes");
                return;
            } '7' == c[i] '7' c[i] c i {
                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 public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        System.out.println("No");
    }
} public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        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 s = sc.next();

        // 文字列切り出し
        char c[] = new char[s.length()];
        for(int i = 0; i < s.length(); i++) {
            c[i] = s.charAt(i);
            if('7' == c[i]) {
                System.out.println("Yes");
                return;
            }
        }
        
        System.out.println("No");
    }
}
