import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	} main {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) Integer a = sc.nextInt(); a sc.nextInt() sc.nextInt sc Integer b = sc.nextInt(); b sc.nextInt() sc.nextInt sc Integer c = sc.nextInt(); c sc.nextInt() sc.nextInt sc Integer d = sc.nextInt(); d sc.nextInt() sc.nextInt sc Integer e = sc.nextInt(); e sc.nextInt() sc.nextInt sc Integer k = sc.nextInt(); k sc.nextInt() sc.nextInt sc if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        } (e-a) > k (e-a) e a k {
        	System.out.println(":(");  
        } System.out.println(":(") System.out.println System.out System System.out ":(" {
          System.out.println("Yay!");
        } System.out.println("Yay!") System.out.println System.out System System.out "Yay!" String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	Integer a = sc.nextInt();
      	Integer b = sc.nextInt();
      	Integer c = sc.nextInt();
      	Integer d = sc.nextInt();
      	Integer e = sc.nextInt();
      	Integer k = sc.nextInt();
		if((e-a) > k){
        	System.out.println(":(");  
        }else{
          System.out.println("Yay!");
        }
	}
}