//package com.company;

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

//public class Giveaway {
    public class Main {
    public static boolean getSum(int n)
    {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    }
    public static void main(String[] args) {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    }


    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
//--------------------------------------------------------

} import java.io.*; io.* java import java.util.*; util.* java     public class Main {
    public static boolean getSum(int n)
    {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    }
    public static void main(String[] args) {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    }


    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
//--------------------------------------------------------

} Main //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out; out public static boolean getSum(int n)
    {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    } getSum {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    } int sum = 0; sum 0 while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        } n != 0 n 0 {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        } sum = n % 10 sum n % 10 n 10 n = n/10 n n/10 n 10 if(sum==7)
                return true; sum==7 sum 7 return true; true return false; false int n n public static void main(String[] args) {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    } main {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    } out = new PrintWriter(new BufferedOutputStream(System.out)) out new PrintWriter(new BufferedOutputStream(System.out)) MyScanner sc = new MyScanner(); sc new MyScanner() out.println(getSum(sc.nextInt())?"Yes":"No") out.println out getSum(sc.nextInt())?"Yes":"No" getSum(sc.nextInt()) getSum sc.nextInt() sc.nextInt sc "Yes" "No" out.close() out.close out String[] args args public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    } MyScanner BufferedReader br; br StringTokenizer st; st public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        } MyScanner {
            br = new BufferedReader(new InputStreamReader(System.in));
        } br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        } next {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        } while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } IOException e {
                    e.printStackTrace();
                } e.printStackTrace() e.printStackTrace e {
                    st = new StringTokenizer(br.readLine());
                } st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong() {
            return Long.parseLong(next());
        } nextLong {
            return Long.parseLong(next());
        } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble() {
            return Double.parseDouble(next());
        } nextDouble {
            return Double.parseDouble(next());
        } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        } nextLine {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        } String str = ""; str "" try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } IOException e {
                e.printStackTrace();
            } e.printStackTrace() e.printStackTrace e {
                str = br.readLine();
            } str = br.readLine() str br.readLine() br.readLine br return str; str     public class Main {
    public static boolean getSum(int n)
    {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    }
    public static void main(String[] args) {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    }


    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
//--------------------------------------------------------

}     public class Main {
    public static boolean getSum(int n)
    {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    }
    public static void main(String[] args) {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    }


    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
//--------------------------------------------------------

} Main
//package com.company;

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

//public class Giveaway {
    public class Main {
    public static boolean getSum(int n)
    {
        int sum = 0;
    
        while (n != 0)
        {
            sum = n % 10;
            n = n/10;
            if(sum==7)
                return true;
        }
    
        return false;
    }
    public static void main(String[] args) {

        out = new PrintWriter(new BufferedOutputStream(System.out));
        MyScanner sc = new MyScanner();//start
        out.println(getSum(sc.nextInt())?"Yes":"No");
        out.close();
    }


    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
//--------------------------------------------------------

}
