import java.util.Scanner;

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

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