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

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

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