

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		String N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				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 N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}
		System.out.println("No");



		}

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

		Scanner sc=new Scanner(System.in);
		String N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}
		System.out.println("No");



		} main {

		Scanner sc=new Scanner(System.in);
		String N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}
		System.out.println("No");



		} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) String N = sc.nextLine(); N sc.nextLine() sc.nextLine sc sc.close() sc.close sc for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		} int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		} {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		} if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			} N.charAt(i) == '7' N.charAt(i) N.charAt 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 public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);
		String N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				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 N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				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 N = sc.nextLine();
		sc.close();

		for(int i=0; i<3; i++) {
			if(N.charAt(i) == '7') {
				System.out.println("Yes");
				return;
			}
		}
		System.out.println("No");



		}

	}


