import java.io.*;
import java.math.*;
import java.text.*;
import java.util.*;
import java.util.regex.*;

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

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