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

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    } main {
        Scanner sc = new Scanner(System.in);

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String line = sc.nextLine(); line sc.nextLine() sc.nextLine sc if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        } line.contains("7") line.contains line "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 sc = new Scanner(System.in);

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    }
} public class Main {
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    }
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        String line = sc.nextLine();
        
        if(line.contains("7")) {
        	System.out.println("Yes");
        } else {
        	System.out.println("No");
        }
        
    }
}
