

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			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 a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}

	}

} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}

	} main {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int d = sc.nextInt(); d sc.nextInt() sc.nextInt sc int e = sc.nextInt(); e sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		} Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k Math.abs(c - e) > k Math.abs(c - d) > k Math.abs(b - e) > k Math.abs(b - d) > k Math.abs(b - c) > k Math.abs(a - e) > k Math.abs(a - d) > k Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k Math.abs(a - b) > k Math.abs(a - b) Math.abs Math a - b a b k Math.abs(a - c) > k Math.abs(a - c) Math.abs Math a - c a c k Math.abs(a - d) > k Math.abs(a - d) Math.abs Math a - d a d k Math.abs(a - e) > k Math.abs(a - e) Math.abs Math a - e a e k Math.abs(b - c) > k Math.abs(b - c) Math.abs Math b - c b c k Math.abs(b - d) > k Math.abs(b - d) Math.abs Math b - d b d k Math.abs(b - e) > k Math.abs(b - e) Math.abs Math b - e b e k Math.abs(c - d) > k Math.abs(c - d) Math.abs Math c - d c d k Math.abs(c - e) > k Math.abs(c - e) Math.abs Math c - e c e k Math.abs(d - e) > k Math.abs(d - e) Math.abs Math d - e d e 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);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}

	}

} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			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 a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if (Math.abs(a - b) > k || Math.abs(a - c) > k || Math.abs(a - d) > k || Math.abs(a - e) > k
				|| Math.abs(b - c) > k || Math.abs(b - d) > k || Math.abs(b - e) > k || Math.abs(c - d) > k
				|| Math.abs(c - e) > k || Math.abs(d - e) > k) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}

	}

}
