import java.util.*;

public class Main {
	public static void main(String args[]) {
    	Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        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 s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main public static void main(String args[]) {
    	Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } main {
    	Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        } char c s.toCharArray() s.toCharArray s {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        } {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        } if (c == '7') {
            	System.out.println("Yes");
                return;
            } c == '7' c '7' {
            	System.out.println("Yes");
                return;
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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 s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} public class Main {
	public static void main(String args[]) {
    	Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
} Main
import java.util.*;

public class Main {
	public static void main(String args[]) {
    	Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
      	for (char c : s.toCharArray()) {
        	if (c == '7') {
            	System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
}