
import java.io.*;
import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		boolean flag = false;
		for(int i=0;i<n.length();i++){
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		}

		if(flag){
			System.out.println("Yes");
		}	
		else{
			System.out.println("No");
		}
	}
} import java.io.*; io.* java import java.util.*; util.* java class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		boolean flag = false;
		for(int i=0;i<n.length();i++){
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		}

		if(flag){
			System.out.println("Yes");
		}	
		else{
			System.out.println("No");
		}
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		boolean flag = false;
		for(int i=0;i<n.length();i++){
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		}

		if(flag){
			System.out.println("Yes");
		}	
		else{
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		boolean flag = false;
		for(int i=0;i<n.length();i++){
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		}

		if(flag){
			System.out.println("Yes");
		}	
		else{
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String n = sc.next(); n sc.next() sc.next sc boolean flag = false; flag false for(int i=0;i<n.length();i++){
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		} int i=0; int i=0; i 0 i<n.length() i n.length() n.length n i++ i++ i {
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		} {
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		} if((int)n.charAt(i) == (int)'7'){
				flag = true;
			} (int)n.charAt(i) == (int)'7' (int)n.charAt(i) n.charAt n i (int)'7' {
				flag = true;
			} flag = true flag true if(flag){
			System.out.println("Yes");
		}	
		else{
			System.out.println("No");
		} flag {
			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

import java.io.*;
import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		boolean flag = false;
		for(int i=0;i<n.length();i++){
			if((int)n.charAt(i) == (int)'7'){
				flag = true;
			}	
		}

		if(flag){
			System.out.println("Yes");
		}	
		else{
			System.out.println("No");
		}
	}
}