import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}
}

 import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int m = sc.nextInt(); m sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int l = sc.nextInt(); l sc.nextInt() sc.nextInt sc int g = sc.nextInt(); g sc.nextInt() sc.nextInt sc int p = sc.nextInt(); p sc.nextInt() sc.nextInt sc long count=0; count 0 if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		} m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p g-k>p l-k>p g-m>p l-m>p k-m>p g-n>p l-n>p m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p m-n>p m-n m n p k-n>p k-n k n p l-n>p l-n l n p g-n>p g-n g n p k-m>p k-m k m p l-m>p l-m l m p g-m>p g-m g m p l-k>p l-k l k p g-k>p g-k g k p g-l>p g-l g l p {
			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);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int k = sc.nextInt();
		int l = sc.nextInt();
		int g = sc.nextInt();
		int p = sc.nextInt();
		long count=0;

		if(m-n>p ||k-n>p ||l-n>p ||g-n>p||k-m>p||l-m>p||g-m>p||l-k>p||g-k>p||g-l>p) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}
}


