import java.util.Scanner;

public class Main {
	void run() {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	}
    public static void main(String[] args) {
    	new Main().run();
    }
} import java.util.Scanner; Scanner java.util public class Main {
	void run() {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	}
    public static void main(String[] args) {
    	new Main().run();
    }
} Main void run() {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	} run {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	} int min = Integer.MAX_VALUE min Integer.MAX_VALUE Integer Integer.MAX_VALUE max = Integer.MIN_VALUE; max Integer.MIN_VALUE Integer Integer.MIN_VALUE Scanner scan = new Scanner(System.in); scan new Scanner(System.in) for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		} int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		} {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		} int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan max = Math.max(max, n) max Math.max(max, n) Math.max Math max n min = Math.min(min, n) min Math.min(min, n) Math.min Math min n int k = scan.nextInt(); k scan.nextInt() scan.nextInt scan System.out.println((k >= (max - min) ? "Yay!" : ":(")) System.out.println System.out System System.out (k >= (max - min) ? "Yay!" : ":(") k >= (max - min) k (max - min) max min "Yay!" ":(" public static void main(String[] args) {
    	new Main().run();
    } main {
    	new Main().run();
    } new Main().run() new Main().run new Main() String[] args args public class Main {
	void run() {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	}
    public static void main(String[] args) {
    	new Main().run();
    }
} public class Main {
	void run() {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	}
    public static void main(String[] args) {
    	new Main().run();
    }
} Main
import java.util.Scanner;

public class Main {
	void run() {
		int min = Integer.MAX_VALUE, max = Integer.MIN_VALUE;
		Scanner scan = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			int n = scan.nextInt();
			max = Math.max(max, n);
			min = Math.min(min, n);
		}
		int k = scan.nextInt();
		System.out.println((k >= (max - min) ? "Yay!" : ":("));
	}
    public static void main(String[] args) {
    	new Main().run();
    }
}
