import java.util.*;

public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    String  N = sc.next();

	boolean ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		System.out.println("Yes");
	}else{
		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  N = sc.next();

	boolean ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		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 ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		System.out.println("Yes");
	}else{
		System.out.println("No");
	}
} main {
    
    Scanner sc = new Scanner(System.in);
    String  N = sc.next();

	boolean ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		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 ch =false; ch false for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    } int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    } {
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    } if(N.charAt(i)== '7'){
			ch=true;
			break;
    } N.charAt(i)== '7' N.charAt(i) N.charAt N i '7' {
			ch=true;
			break;
    } ch=true ch true break; if(ch){
		System.out.println("Yes");
	}else{
		System.out.println("No");
	} ch {
		System.out.println("Yes");
	} System.out.println("Yes") System.out.println System.out System System.out "Yes" {
		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){
    
    Scanner sc = new Scanner(System.in);
    String  N = sc.next();

	boolean ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		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 ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		System.out.println("Yes");
	}else{
		System.out.println("No");
	}
}
} Main
import java.util.*;

public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    String  N = sc.next();

	boolean ch =false;
		for(int i=0; i<3; i++){
		if(N.charAt(i)== '7'){
			ch=true;
			break;
    }
    }
	if(ch){
		System.out.println("Yes");
	}else{
		System.out.println("No");
	}
}
}