import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) char[] N=sc.next().toCharArray(); N sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        } char c N {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        } {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        } if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            } c=='7' c '7' {
                System.out.println("Yes");
                System.exit(0);
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" System.exit(0) System.exit System 0 System.out.println("No") System.out.println System.out System System.out "No" sc.close() sc.close sc String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    }
} Main
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] N=sc.next().toCharArray();

        for (char c : N) {
            if(c=='7'){
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
        sc.close();
    }
}